diff --git a/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2018_05_01_preview/__init__.py b/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2018_05_01_preview/__init__.py
new file mode 100644
index 0000000000000..e8714b719dfc2
--- /dev/null
+++ b/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2018_05_01_preview/__init__.py
@@ -0,0 +1,19 @@
+# coding=utf-8
+# --------------------------------------------------------------------------
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License. See License.txt in the project root for
+# license information.
+#
+# Code generated by Microsoft (R) AutoRest Code Generator.
+# Changes may cause incorrect behavior and will be lost if the code is
+# regenerated.
+# --------------------------------------------------------------------------
+
+from ._configuration import AuthorizationManagementClientConfiguration
+from ._authorization_management_client import AuthorizationManagementClient
+__all__ = ['AuthorizationManagementClient', 'AuthorizationManagementClientConfiguration']
+
+from .version import VERSION
+
+__version__ = VERSION
+
diff --git a/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2018_05_01_preview/_authorization_management_client.py b/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2018_05_01_preview/_authorization_management_client.py
new file mode 100644
index 0000000000000..5be11b05b4c35
--- /dev/null
+++ b/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2018_05_01_preview/_authorization_management_client.py
@@ -0,0 +1,89 @@
+# coding=utf-8
+# --------------------------------------------------------------------------
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License. See License.txt in the project root for
+# license information.
+#
+# Code generated by Microsoft (R) AutoRest Code Generator.
+# Changes may cause incorrect behavior and will be lost if the code is
+# regenerated.
+# --------------------------------------------------------------------------
+
+from msrest.service_client import SDKClient
+from msrest import Serializer, Deserializer
+
+from ._configuration import AuthorizationManagementClientConfiguration
+from .operations import Operations
+from .operations import AccessReviewScheduleDefinitionsOperations
+from .operations import AccessReviewInstancesOperations
+from .operations import AccessReviewInstanceOperations
+from .operations import AccessReviewInstanceDecisionsOperations
+from .operations import AccessReviewDefaultSettingsOperations
+from .operations import AccessReviewScheduleDefinitionsAssignedForMyApprovalOperations
+from .operations import AccessReviewInstancesAssignedForMyApprovalOperations
+from .operations import AccessReviewInstanceMyDecisionsOperations
+from . import models
+
+
+class AuthorizationManagementClient(SDKClient):
+    """Access reviews service provides the workflow for running access reviews on different kind of resources.
+
+    :ivar config: Configuration for client.
+    :vartype config: AuthorizationManagementClientConfiguration
+
+    :ivar operations: Operations operations
+    :vartype operations: azure.mgmt.authorization.v2018_05_01_preview.operations.Operations
+    :ivar access_review_schedule_definitions: AccessReviewScheduleDefinitions operations
+    :vartype access_review_schedule_definitions: azure.mgmt.authorization.v2018_05_01_preview.operations.AccessReviewScheduleDefinitionsOperations
+    :ivar access_review_instances: AccessReviewInstances operations
+    :vartype access_review_instances: azure.mgmt.authorization.v2018_05_01_preview.operations.AccessReviewInstancesOperations
+    :ivar access_review_instance: AccessReviewInstance operations
+    :vartype access_review_instance: azure.mgmt.authorization.v2018_05_01_preview.operations.AccessReviewInstanceOperations
+    :ivar access_review_instance_decisions: AccessReviewInstanceDecisions operations
+    :vartype access_review_instance_decisions: azure.mgmt.authorization.v2018_05_01_preview.operations.AccessReviewInstanceDecisionsOperations
+    :ivar access_review_default_settings: AccessReviewDefaultSettings operations
+    :vartype access_review_default_settings: azure.mgmt.authorization.v2018_05_01_preview.operations.AccessReviewDefaultSettingsOperations
+    :ivar access_review_schedule_definitions_assigned_for_my_approval: AccessReviewScheduleDefinitionsAssignedForMyApproval operations
+    :vartype access_review_schedule_definitions_assigned_for_my_approval: azure.mgmt.authorization.v2018_05_01_preview.operations.AccessReviewScheduleDefinitionsAssignedForMyApprovalOperations
+    :ivar access_review_instances_assigned_for_my_approval: AccessReviewInstancesAssignedForMyApproval operations
+    :vartype access_review_instances_assigned_for_my_approval: azure.mgmt.authorization.v2018_05_01_preview.operations.AccessReviewInstancesAssignedForMyApprovalOperations
+    :ivar access_review_instance_my_decisions: AccessReviewInstanceMyDecisions operations
+    :vartype access_review_instance_my_decisions: azure.mgmt.authorization.v2018_05_01_preview.operations.AccessReviewInstanceMyDecisionsOperations
+
+    :param credentials: Credentials needed for the client to connect to Azure.
+    :type credentials: :mod:`A msrestazure Credentials
+     object<msrestazure.azure_active_directory>`
+    :param subscription_id: The ID of the target subscription.
+    :type subscription_id: str
+    :param str base_url: Service URL
+    """
+
+    def __init__(
+            self, credentials, subscription_id, base_url=None):
+
+        self.config = AuthorizationManagementClientConfiguration(credentials, subscription_id, base_url)
+        super(AuthorizationManagementClient, self).__init__(self.config.credentials, self.config)
+
+        client_models = {k: v for k, v in models.__dict__.items() if isinstance(v, type)}
+        self.api_version = '2018-05-01-preview'
+        self._serialize = Serializer(client_models)
+        self._deserialize = Deserializer(client_models)
+
+        self.operations = Operations(
+            self._client, self.config, self._serialize, self._deserialize)
+        self.access_review_schedule_definitions = AccessReviewScheduleDefinitionsOperations(
+            self._client, self.config, self._serialize, self._deserialize)
+        self.access_review_instances = AccessReviewInstancesOperations(
+            self._client, self.config, self._serialize, self._deserialize)
+        self.access_review_instance = AccessReviewInstanceOperations(
+            self._client, self.config, self._serialize, self._deserialize)
+        self.access_review_instance_decisions = AccessReviewInstanceDecisionsOperations(
+            self._client, self.config, self._serialize, self._deserialize)
+        self.access_review_default_settings = AccessReviewDefaultSettingsOperations(
+            self._client, self.config, self._serialize, self._deserialize)
+        self.access_review_schedule_definitions_assigned_for_my_approval = AccessReviewScheduleDefinitionsAssignedForMyApprovalOperations(
+            self._client, self.config, self._serialize, self._deserialize)
+        self.access_review_instances_assigned_for_my_approval = AccessReviewInstancesAssignedForMyApprovalOperations(
+            self._client, self.config, self._serialize, self._deserialize)
+        self.access_review_instance_my_decisions = AccessReviewInstanceMyDecisionsOperations(
+            self._client, self.config, self._serialize, self._deserialize)
diff --git a/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2018_05_01_preview/_configuration.py b/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2018_05_01_preview/_configuration.py
new file mode 100644
index 0000000000000..c192b8088f15e
--- /dev/null
+++ b/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2018_05_01_preview/_configuration.py
@@ -0,0 +1,48 @@
+# coding=utf-8
+# --------------------------------------------------------------------------
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License. See License.txt in the project root for
+# license information.
+#
+# Code generated by Microsoft (R) AutoRest Code Generator.
+# Changes may cause incorrect behavior and will be lost if the code is
+# regenerated.
+# --------------------------------------------------------------------------
+from msrestazure import AzureConfiguration
+
+from .version import VERSION
+
+
+class AuthorizationManagementClientConfiguration(AzureConfiguration):
+    """Configuration for AuthorizationManagementClient
+    Note that all parameters used to create this instance are saved as instance
+    attributes.
+
+    :param credentials: Credentials needed for the client to connect to Azure.
+    :type credentials: :mod:`A msrestazure Credentials
+     object<msrestazure.azure_active_directory>`
+    :param subscription_id: The ID of the target subscription.
+    :type subscription_id: str
+    :param str base_url: Service URL
+    """
+
+    def __init__(
+            self, credentials, subscription_id, base_url=None):
+
+        if credentials is None:
+            raise ValueError("Parameter 'credentials' must not be None.")
+        if subscription_id is None:
+            raise ValueError("Parameter 'subscription_id' must not be None.")
+        if not base_url:
+            base_url = 'https://management.azure.com'
+
+        super(AuthorizationManagementClientConfiguration, self).__init__(base_url)
+
+        # Starting Autorest.Python 4.0.64, make connection pool activated by default
+        self.keep_alive = True
+
+        self.add_user_agent('azure-mgmt-authorization/{}'.format(VERSION))
+        self.add_user_agent('Azure-SDK-For-Python')
+
+        self.credentials = credentials
+        self.subscription_id = subscription_id
diff --git a/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2018_05_01_preview/models/__init__.py b/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2018_05_01_preview/models/__init__.py
new file mode 100644
index 0000000000000..ca65be97a222d
--- /dev/null
+++ b/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2018_05_01_preview/models/__init__.py
@@ -0,0 +1,95 @@
+# coding=utf-8
+# --------------------------------------------------------------------------
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License. See License.txt in the project root for
+# license information.
+#
+# Code generated by Microsoft (R) AutoRest Code Generator.
+# Changes may cause incorrect behavior and will be lost if the code is
+# regenerated.
+# --------------------------------------------------------------------------
+
+try:
+    from ._models_py3 import AccessReviewDecision
+    from ._models_py3 import AccessReviewDecisionProperties
+    from ._models_py3 import AccessReviewDecisionTarget
+    from ._models_py3 import AccessReviewDefaultSettings
+    from ._models_py3 import AccessReviewInstance
+    from ._models_py3 import AccessReviewReviewer
+    from ._models_py3 import AccessReviewScheduleDefinition
+    from ._models_py3 import AccessReviewScheduleDefinitionProperties
+    from ._models_py3 import AccessReviewScheduleSettings
+    from ._models_py3 import ErrorDefinition, ErrorDefinitionException
+    from ._models_py3 import ErrorDefinitionProperties
+    from ._models_py3 import Operation
+    from ._models_py3 import OperationDisplay
+    from ._models_py3 import ServicePrincipalDecisionTarget
+    from ._models_py3 import UserDecisionTarget
+except (SyntaxError, ImportError):
+    from ._models import AccessReviewDecision
+    from ._models import AccessReviewDecisionProperties
+    from ._models import AccessReviewDecisionTarget
+    from ._models import AccessReviewDefaultSettings
+    from ._models import AccessReviewInstance
+    from ._models import AccessReviewReviewer
+    from ._models import AccessReviewScheduleDefinition
+    from ._models import AccessReviewScheduleDefinitionProperties
+    from ._models import AccessReviewScheduleSettings
+    from ._models import ErrorDefinition, ErrorDefinitionException
+    from ._models import ErrorDefinitionProperties
+    from ._models import Operation
+    from ._models import OperationDisplay
+    from ._models import ServicePrincipalDecisionTarget
+    from ._models import UserDecisionTarget
+from ._paged_models import AccessReviewDecisionPaged
+from ._paged_models import AccessReviewInstancePaged
+from ._paged_models import AccessReviewScheduleDefinitionPaged
+from ._paged_models import OperationPaged
+from ._authorization_management_client_enums import (
+    AccessReviewScheduleDefinitionStatus,
+    AccessReviewActorIdentityType,
+    DefaultDecisionType,
+    AccessReviewRecurrencePatternType,
+    AccessReviewRecurrenceRangeType,
+    AccessReviewScopePrincipalType,
+    AccessReviewReviewerType,
+    AccessReviewScheduleDefinitionReviewersType,
+    AccessReviewInstanceStatus,
+    AccessRecommendationType,
+    AccessReviewResult,
+    AccessReviewApplyResult,
+)
+
+__all__ = [
+    'AccessReviewDecision',
+    'AccessReviewDecisionProperties',
+    'AccessReviewDecisionTarget',
+    'AccessReviewDefaultSettings',
+    'AccessReviewInstance',
+    'AccessReviewReviewer',
+    'AccessReviewScheduleDefinition',
+    'AccessReviewScheduleDefinitionProperties',
+    'AccessReviewScheduleSettings',
+    'ErrorDefinition', 'ErrorDefinitionException',
+    'ErrorDefinitionProperties',
+    'Operation',
+    'OperationDisplay',
+    'ServicePrincipalDecisionTarget',
+    'UserDecisionTarget',
+    'OperationPaged',
+    'AccessReviewScheduleDefinitionPaged',
+    'AccessReviewInstancePaged',
+    'AccessReviewDecisionPaged',
+    'AccessReviewScheduleDefinitionStatus',
+    'AccessReviewActorIdentityType',
+    'DefaultDecisionType',
+    'AccessReviewRecurrencePatternType',
+    'AccessReviewRecurrenceRangeType',
+    'AccessReviewScopePrincipalType',
+    'AccessReviewReviewerType',
+    'AccessReviewScheduleDefinitionReviewersType',
+    'AccessReviewInstanceStatus',
+    'AccessRecommendationType',
+    'AccessReviewResult',
+    'AccessReviewApplyResult',
+]
diff --git a/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2018_05_01_preview/models/_authorization_management_client_enums.py b/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2018_05_01_preview/models/_authorization_management_client_enums.py
new file mode 100644
index 0000000000000..f5f418ee37b8a
--- /dev/null
+++ b/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2018_05_01_preview/models/_authorization_management_client_enums.py
@@ -0,0 +1,113 @@
+# coding=utf-8
+# --------------------------------------------------------------------------
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License. See License.txt in the project root for
+# license information.
+#
+# Code generated by Microsoft (R) AutoRest Code Generator.
+# Changes may cause incorrect behavior and will be lost if the code is
+# regenerated.
+# --------------------------------------------------------------------------
+
+from enum import Enum
+
+
+class AccessReviewScheduleDefinitionStatus(str, Enum):
+
+    not_started = "NotStarted"
+    in_progress = "InProgress"
+    completed = "Completed"
+    applied = "Applied"
+    initializing = "Initializing"
+    applying = "Applying"
+    completing = "Completing"
+    scheduled = "Scheduled"
+    auto_reviewing = "AutoReviewing"
+    auto_reviewed = "AutoReviewed"
+    starting = "Starting"
+
+
+class AccessReviewActorIdentityType(str, Enum):
+
+    user = "user"
+    service_principal = "servicePrincipal"
+
+
+class DefaultDecisionType(str, Enum):
+
+    approve = "Approve"
+    deny = "Deny"
+    recommendation = "Recommendation"
+
+
+class AccessReviewRecurrencePatternType(str, Enum):
+
+    weekly = "weekly"
+    absolute_monthly = "absoluteMonthly"
+
+
+class AccessReviewRecurrenceRangeType(str, Enum):
+
+    end_date = "endDate"
+    no_end = "noEnd"
+    numbered = "numbered"
+
+
+class AccessReviewScopePrincipalType(str, Enum):
+
+    user = "user"
+    service_principal = "servicePrincipal"
+
+
+class AccessReviewReviewerType(str, Enum):
+
+    user = "user"
+    service_principal = "servicePrincipal"
+
+
+class AccessReviewScheduleDefinitionReviewersType(str, Enum):
+
+    assigned = "Assigned"
+    self_enum = "Self"
+    managers = "Managers"
+
+
+class AccessReviewInstanceStatus(str, Enum):
+
+    not_started = "NotStarted"
+    in_progress = "InProgress"
+    completed = "Completed"
+    applied = "Applied"
+    initializing = "Initializing"
+    applying = "Applying"
+    completing = "Completing"
+    scheduled = "Scheduled"
+    auto_reviewing = "AutoReviewing"
+    auto_reviewed = "AutoReviewed"
+    starting = "Starting"
+
+
+class AccessRecommendationType(str, Enum):
+
+    approve = "Approve"
+    deny = "Deny"
+    no_info_available = "NoInfoAvailable"
+
+
+class AccessReviewResult(str, Enum):
+
+    approve = "Approve"
+    deny = "Deny"
+    not_reviewed = "NotReviewed"
+    dont_know = "DontKnow"
+    not_notified = "NotNotified"
+
+
+class AccessReviewApplyResult(str, Enum):
+
+    new = "New"
+    applying = "Applying"
+    applied_successfully = "AppliedSuccessfully"
+    applied_with_unknown_failure = "AppliedWithUnknownFailure"
+    applied_successfully_but_object_not_found = "AppliedSuccessfullyButObjectNotFound"
+    apply_not_supported = "ApplyNotSupported"
diff --git a/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2018_05_01_preview/models/_models.py b/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2018_05_01_preview/models/_models.py
new file mode 100644
index 0000000000000..a1ca401fb100a
--- /dev/null
+++ b/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2018_05_01_preview/models/_models.py
@@ -0,0 +1,1095 @@
+# coding=utf-8
+# --------------------------------------------------------------------------
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License. See License.txt in the project root for
+# license information.
+#
+# Code generated by Microsoft (R) AutoRest Code Generator.
+# Changes may cause incorrect behavior and will be lost if the code is
+# regenerated.
+# --------------------------------------------------------------------------
+
+from msrest.serialization import Model
+from msrest.exceptions import HttpOperationError
+
+
+class AccessReviewDecision(Model):
+    """Access Review.
+
+    Variables are only populated by the server, and will be ignored when
+    sending a request.
+
+    :ivar id: The access review decision id.
+    :vartype id: str
+    :ivar name: The access review decision name.
+    :vartype name: str
+    :ivar type: The resource type.
+    :vartype type: str
+    :ivar recommendation: The feature- generated recommendation shown to the
+     reviewer. Possible values include: 'Approve', 'Deny', 'NoInfoAvailable'
+    :vartype recommendation: str or
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessRecommendationType
+    :param decision: The decision on the approval step. This value is
+     initially set to NotReviewed. Approvers can take action of Approve/Deny.
+     Possible values include: 'Approve', 'Deny', 'NotReviewed', 'DontKnow',
+     'NotNotified'
+    :type decision: str or
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewResult
+    :param justification: Justification provided by approvers for their action
+    :type justification: str
+    :ivar reviewed_date_time: Date Time when a decision was taken.
+    :vartype reviewed_date_time: datetime
+    :ivar principal_id: The identity id
+    :vartype principal_id: str
+    :ivar principal_type: The identity type : user/servicePrincipal. Possible
+     values include: 'user', 'servicePrincipal'
+    :vartype principal_type: str or
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewActorIdentityType
+    :ivar principal_name: The identity display name
+    :vartype principal_name: str
+    :ivar user_principal_name: The user principal name(if valid)
+    :vartype user_principal_name: str
+    :ivar apply_result: The outcome of applying the decision. Possible values
+     include: 'New', 'Applying', 'AppliedSuccessfully',
+     'AppliedWithUnknownFailure', 'AppliedSuccessfullyButObjectNotFound',
+     'ApplyNotSupported'
+    :vartype apply_result: str or
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewApplyResult
+    :ivar applied_date_time: The date and time when the review decision was
+     applied.
+    :vartype applied_date_time: datetime
+    :ivar principal_id1: The identity id
+    :vartype principal_id1: str
+    :ivar principal_type1: The identity type : user/servicePrincipal. Possible
+     values include: 'user', 'servicePrincipal'
+    :vartype principal_type1: str or
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewActorIdentityType
+    :ivar principal_name1: The identity display name
+    :vartype principal_name1: str
+    :ivar user_principal_name1: The user principal name(if valid)
+    :vartype user_principal_name1: str
+    """
+
+    _validation = {
+        'id': {'readonly': True},
+        'name': {'readonly': True},
+        'type': {'readonly': True},
+        'recommendation': {'readonly': True},
+        'reviewed_date_time': {'readonly': True},
+        'principal_id': {'readonly': True},
+        'principal_type': {'readonly': True},
+        'principal_name': {'readonly': True},
+        'user_principal_name': {'readonly': True},
+        'apply_result': {'readonly': True},
+        'applied_date_time': {'readonly': True},
+        'principal_id1': {'readonly': True},
+        'principal_type1': {'readonly': True},
+        'principal_name1': {'readonly': True},
+        'user_principal_name1': {'readonly': True},
+    }
+
+    _attribute_map = {
+        'id': {'key': 'id', 'type': 'str'},
+        'name': {'key': 'name', 'type': 'str'},
+        'type': {'key': 'type', 'type': 'str'},
+        'recommendation': {'key': 'properties.recommendation', 'type': 'str'},
+        'decision': {'key': 'properties.decision', 'type': 'str'},
+        'justification': {'key': 'properties.justification', 'type': 'str'},
+        'reviewed_date_time': {'key': 'properties.reviewedDateTime', 'type': 'iso-8601'},
+        'principal_id': {'key': 'properties.reviewedBy.principalId', 'type': 'str'},
+        'principal_type': {'key': 'properties.reviewedBy.principalType', 'type': 'str'},
+        'principal_name': {'key': 'properties.reviewedBy.principalName', 'type': 'str'},
+        'user_principal_name': {'key': 'properties.reviewedBy.userPrincipalName', 'type': 'str'},
+        'apply_result': {'key': 'properties.applyResult', 'type': 'str'},
+        'applied_date_time': {'key': 'properties.appliedDateTime', 'type': 'iso-8601'},
+        'principal_id1': {'key': 'properties.appliedBy.principalId', 'type': 'str'},
+        'principal_type1': {'key': 'properties.appliedBy.principalType', 'type': 'str'},
+        'principal_name1': {'key': 'properties.appliedBy.principalName', 'type': 'str'},
+        'user_principal_name1': {'key': 'properties.appliedBy.userPrincipalName', 'type': 'str'},
+    }
+
+    def __init__(self, **kwargs):
+        super(AccessReviewDecision, self).__init__(**kwargs)
+        self.id = None
+        self.name = None
+        self.type = None
+        self.recommendation = None
+        self.decision = kwargs.get('decision', None)
+        self.justification = kwargs.get('justification', None)
+        self.reviewed_date_time = None
+        self.principal_id = None
+        self.principal_type = None
+        self.principal_name = None
+        self.user_principal_name = None
+        self.apply_result = None
+        self.applied_date_time = None
+        self.principal_id1 = None
+        self.principal_type1 = None
+        self.principal_name1 = None
+        self.user_principal_name1 = None
+
+
+class AccessReviewDecisionProperties(Model):
+    """Approval Step.
+
+    Variables are only populated by the server, and will be ignored when
+    sending a request.
+
+    :ivar recommendation: The feature- generated recommendation shown to the
+     reviewer. Possible values include: 'Approve', 'Deny', 'NoInfoAvailable'
+    :vartype recommendation: str or
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessRecommendationType
+    :param decision: The decision on the approval step. This value is
+     initially set to NotReviewed. Approvers can take action of Approve/Deny.
+     Possible values include: 'Approve', 'Deny', 'NotReviewed', 'DontKnow',
+     'NotNotified'
+    :type decision: str or
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewResult
+    :param justification: Justification provided by approvers for their action
+    :type justification: str
+    :ivar reviewed_date_time: Date Time when a decision was taken.
+    :vartype reviewed_date_time: datetime
+    :ivar principal_id: The identity id
+    :vartype principal_id: str
+    :ivar principal_type: The identity type : user/servicePrincipal. Possible
+     values include: 'user', 'servicePrincipal'
+    :vartype principal_type: str or
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewActorIdentityType
+    :ivar principal_name: The identity display name
+    :vartype principal_name: str
+    :ivar user_principal_name: The user principal name(if valid)
+    :vartype user_principal_name: str
+    :ivar apply_result: The outcome of applying the decision. Possible values
+     include: 'New', 'Applying', 'AppliedSuccessfully',
+     'AppliedWithUnknownFailure', 'AppliedSuccessfullyButObjectNotFound',
+     'ApplyNotSupported'
+    :vartype apply_result: str or
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewApplyResult
+    :ivar applied_date_time: The date and time when the review decision was
+     applied.
+    :vartype applied_date_time: datetime
+    :ivar principal_id1: The identity id
+    :vartype principal_id1: str
+    :ivar principal_type1: The identity type : user/servicePrincipal. Possible
+     values include: 'user', 'servicePrincipal'
+    :vartype principal_type1: str or
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewActorIdentityType
+    :ivar principal_name1: The identity display name
+    :vartype principal_name1: str
+    :ivar user_principal_name1: The user principal name(if valid)
+    :vartype user_principal_name1: str
+    """
+
+    _validation = {
+        'recommendation': {'readonly': True},
+        'reviewed_date_time': {'readonly': True},
+        'principal_id': {'readonly': True},
+        'principal_type': {'readonly': True},
+        'principal_name': {'readonly': True},
+        'user_principal_name': {'readonly': True},
+        'apply_result': {'readonly': True},
+        'applied_date_time': {'readonly': True},
+        'principal_id1': {'readonly': True},
+        'principal_type1': {'readonly': True},
+        'principal_name1': {'readonly': True},
+        'user_principal_name1': {'readonly': True},
+    }
+
+    _attribute_map = {
+        'recommendation': {'key': 'recommendation', 'type': 'str'},
+        'decision': {'key': 'decision', 'type': 'str'},
+        'justification': {'key': 'justification', 'type': 'str'},
+        'reviewed_date_time': {'key': 'reviewedDateTime', 'type': 'iso-8601'},
+        'principal_id': {'key': 'reviewedBy.principalId', 'type': 'str'},
+        'principal_type': {'key': 'reviewedBy.principalType', 'type': 'str'},
+        'principal_name': {'key': 'reviewedBy.principalName', 'type': 'str'},
+        'user_principal_name': {'key': 'reviewedBy.userPrincipalName', 'type': 'str'},
+        'apply_result': {'key': 'applyResult', 'type': 'str'},
+        'applied_date_time': {'key': 'appliedDateTime', 'type': 'iso-8601'},
+        'principal_id1': {'key': 'appliedBy.principalId', 'type': 'str'},
+        'principal_type1': {'key': 'appliedBy.principalType', 'type': 'str'},
+        'principal_name1': {'key': 'appliedBy.principalName', 'type': 'str'},
+        'user_principal_name1': {'key': 'appliedBy.userPrincipalName', 'type': 'str'},
+    }
+
+    def __init__(self, **kwargs):
+        super(AccessReviewDecisionProperties, self).__init__(**kwargs)
+        self.recommendation = None
+        self.decision = kwargs.get('decision', None)
+        self.justification = kwargs.get('justification', None)
+        self.reviewed_date_time = None
+        self.principal_id = None
+        self.principal_type = None
+        self.principal_name = None
+        self.user_principal_name = None
+        self.apply_result = None
+        self.applied_date_time = None
+        self.principal_id1 = None
+        self.principal_type1 = None
+        self.principal_name1 = None
+        self.user_principal_name1 = None
+
+
+class AccessReviewDecisionTarget(Model):
+    """Target of the decision.
+
+    You probably want to use the sub-classes and not this class directly. Known
+    sub-classes are: UserDecisionTarget, ServicePrincipalDecisionTarget
+
+    All required parameters must be populated in order to send to Azure.
+
+    :param type: Required. Constant filled by server.
+    :type type: str
+    """
+
+    _validation = {
+        'type': {'required': True},
+    }
+
+    _attribute_map = {
+        'type': {'key': 'type', 'type': 'str'},
+    }
+
+    _subtype_map = {
+        'type': {'user': 'UserDecisionTarget', 'servicePrincipal': 'ServicePrincipalDecisionTarget'}
+    }
+
+    def __init__(self, **kwargs):
+        super(AccessReviewDecisionTarget, self).__init__(**kwargs)
+        self.type = None
+
+
+class AccessReviewDefaultSettings(Model):
+    """Access Review Default Settings.
+
+    Variables are only populated by the server, and will be ignored when
+    sending a request.
+
+    :ivar id: The access review default settings id. This is only going to be
+     default
+    :vartype id: str
+    :ivar name: The access review default settings name. This is always going
+     to be Access Review Default Settings
+    :vartype name: str
+    :ivar type: The resource type.
+    :vartype type: str
+    :param mail_notifications_enabled: Flag to indicate whether sending mails
+     to reviewers and the review creator is enabled.
+    :type mail_notifications_enabled: bool
+    :param reminder_notifications_enabled: Flag to indicate whether sending
+     reminder emails to reviewers are enabled.
+    :type reminder_notifications_enabled: bool
+    :param default_decision_enabled: Flag to indicate whether reviewers are
+     required to provide a justification when reviewing access.
+    :type default_decision_enabled: bool
+    :param justification_required_on_approval: Flag to indicate whether the
+     reviewer is required to pass justification when recording a decision.
+    :type justification_required_on_approval: bool
+    :param default_decision: This specifies the behavior for the autoReview
+     feature when an access review completes. Possible values include:
+     'Approve', 'Deny', 'Recommendation'
+    :type default_decision: str or
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.DefaultDecisionType
+    :param auto_apply_decisions_enabled: Flag to indicate whether auto-apply
+     capability, to automatically change the target object access resource, is
+     enabled. If not enabled, a user must, after the review completes, apply
+     the access review.
+    :type auto_apply_decisions_enabled: bool
+    :param recommendations_enabled: Flag to indicate whether showing
+     recommendations to reviewers is enabled.
+    :type recommendations_enabled: bool
+    :param instance_duration_in_days: The duration in days for an instance.
+    :type instance_duration_in_days: int
+    :param type1: The recurrence type : weekly, monthly, etc. Possible values
+     include: 'weekly', 'absoluteMonthly'
+    :type type1: str or
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewRecurrencePatternType
+    :param interval: The interval for recurrence. For a quarterly review, the
+     interval is 3 for type : absoluteMonthly.
+    :type interval: int
+    :param type2: The recurrence range type. The possible values are: endDate,
+     noEnd, numbered. Possible values include: 'endDate', 'noEnd', 'numbered'
+    :type type2: str or
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewRecurrenceRangeType
+    :param number_of_occurrences: The number of times to repeat the access
+     review. Required and must be positive if type is numbered.
+    :type number_of_occurrences: int
+    :param start_date: The DateTime when the review is scheduled to be start.
+     This could be a date in the future. Required on create.
+    :type start_date: datetime
+    :param end_date: The DateTime when the review is scheduled to end.
+     Required if type is endDate
+    :type end_date: datetime
+    """
+
+    _validation = {
+        'id': {'readonly': True},
+        'name': {'readonly': True},
+        'type': {'readonly': True},
+    }
+
+    _attribute_map = {
+        'id': {'key': 'id', 'type': 'str'},
+        'name': {'key': 'name', 'type': 'str'},
+        'type': {'key': 'type', 'type': 'str'},
+        'mail_notifications_enabled': {'key': 'properties.mailNotificationsEnabled', 'type': 'bool'},
+        'reminder_notifications_enabled': {'key': 'properties.reminderNotificationsEnabled', 'type': 'bool'},
+        'default_decision_enabled': {'key': 'properties.defaultDecisionEnabled', 'type': 'bool'},
+        'justification_required_on_approval': {'key': 'properties.justificationRequiredOnApproval', 'type': 'bool'},
+        'default_decision': {'key': 'properties.defaultDecision', 'type': 'str'},
+        'auto_apply_decisions_enabled': {'key': 'properties.autoApplyDecisionsEnabled', 'type': 'bool'},
+        'recommendations_enabled': {'key': 'properties.recommendationsEnabled', 'type': 'bool'},
+        'instance_duration_in_days': {'key': 'properties.instanceDurationInDays', 'type': 'int'},
+        'type1': {'key': 'properties.recurrence.pattern.type', 'type': 'str'},
+        'interval': {'key': 'properties.recurrence.pattern.interval', 'type': 'int'},
+        'type2': {'key': 'properties.recurrence.range.type', 'type': 'str'},
+        'number_of_occurrences': {'key': 'properties.recurrence.range.numberOfOccurrences', 'type': 'int'},
+        'start_date': {'key': 'properties.recurrence.range.startDate', 'type': 'iso-8601'},
+        'end_date': {'key': 'properties.recurrence.range.endDate', 'type': 'iso-8601'},
+    }
+
+    def __init__(self, **kwargs):
+        super(AccessReviewDefaultSettings, self).__init__(**kwargs)
+        self.id = None
+        self.name = None
+        self.type = None
+        self.mail_notifications_enabled = kwargs.get('mail_notifications_enabled', None)
+        self.reminder_notifications_enabled = kwargs.get('reminder_notifications_enabled', None)
+        self.default_decision_enabled = kwargs.get('default_decision_enabled', None)
+        self.justification_required_on_approval = kwargs.get('justification_required_on_approval', None)
+        self.default_decision = kwargs.get('default_decision', None)
+        self.auto_apply_decisions_enabled = kwargs.get('auto_apply_decisions_enabled', None)
+        self.recommendations_enabled = kwargs.get('recommendations_enabled', None)
+        self.instance_duration_in_days = kwargs.get('instance_duration_in_days', None)
+        self.type1 = kwargs.get('type1', None)
+        self.interval = kwargs.get('interval', None)
+        self.type2 = kwargs.get('type2', None)
+        self.number_of_occurrences = kwargs.get('number_of_occurrences', None)
+        self.start_date = kwargs.get('start_date', None)
+        self.end_date = kwargs.get('end_date', None)
+
+
+class AccessReviewInstance(Model):
+    """Access Review Instance.
+
+    Variables are only populated by the server, and will be ignored when
+    sending a request.
+
+    :ivar id: The access review instance id.
+    :vartype id: str
+    :ivar name: The access review instance name.
+    :vartype name: str
+    :ivar type: The resource type.
+    :vartype type: str
+    :ivar status: This read-only field specifies the status of an access
+     review instance. Possible values include: 'NotStarted', 'InProgress',
+     'Completed', 'Applied', 'Initializing', 'Applying', 'Completing',
+     'Scheduled', 'AutoReviewing', 'AutoReviewed', 'Starting'
+    :vartype status: str or
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewInstanceStatus
+    :param start_date_time: The DateTime when the review instance is scheduled
+     to be start.
+    :type start_date_time: datetime
+    :param end_date_time: The DateTime when the review instance is scheduled
+     to end.
+    :type end_date_time: datetime
+    """
+
+    _validation = {
+        'id': {'readonly': True},
+        'name': {'readonly': True},
+        'type': {'readonly': True},
+        'status': {'readonly': True},
+    }
+
+    _attribute_map = {
+        'id': {'key': 'id', 'type': 'str'},
+        'name': {'key': 'name', 'type': 'str'},
+        'type': {'key': 'type', 'type': 'str'},
+        'status': {'key': 'properties.status', 'type': 'str'},
+        'start_date_time': {'key': 'properties.startDateTime', 'type': 'iso-8601'},
+        'end_date_time': {'key': 'properties.endDateTime', 'type': 'iso-8601'},
+    }
+
+    def __init__(self, **kwargs):
+        super(AccessReviewInstance, self).__init__(**kwargs)
+        self.id = None
+        self.name = None
+        self.type = None
+        self.status = None
+        self.start_date_time = kwargs.get('start_date_time', None)
+        self.end_date_time = kwargs.get('end_date_time', None)
+
+
+class AccessReviewReviewer(Model):
+    """Descriptor for what needs to be reviewed.
+
+    Variables are only populated by the server, and will be ignored when
+    sending a request.
+
+    :param principal_id: The id of the reviewer(user/servicePrincipal)
+    :type principal_id: str
+    :ivar principal_type: The identity type : user/servicePrincipal. Possible
+     values include: 'user', 'servicePrincipal'
+    :vartype principal_type: str or
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewReviewerType
+    """
+
+    _validation = {
+        'principal_type': {'readonly': True},
+    }
+
+    _attribute_map = {
+        'principal_id': {'key': 'principalId', 'type': 'str'},
+        'principal_type': {'key': 'principalType', 'type': 'str'},
+    }
+
+    def __init__(self, **kwargs):
+        super(AccessReviewReviewer, self).__init__(**kwargs)
+        self.principal_id = kwargs.get('principal_id', None)
+        self.principal_type = None
+
+
+class AccessReviewScheduleDefinition(Model):
+    """Access Review Schedule Definition.
+
+    Variables are only populated by the server, and will be ignored when
+    sending a request.
+
+    :ivar id: The access review schedule definition id.
+    :vartype id: str
+    :ivar name: The access review schedule definition unique id.
+    :vartype name: str
+    :ivar type: The resource type.
+    :vartype type: str
+    :param display_name: The display name for the schedule definition.
+    :type display_name: str
+    :ivar status: This read-only field specifies the status of an
+     accessReview. Possible values include: 'NotStarted', 'InProgress',
+     'Completed', 'Applied', 'Initializing', 'Applying', 'Completing',
+     'Scheduled', 'AutoReviewing', 'AutoReviewed', 'Starting'
+    :vartype status: str or
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewScheduleDefinitionStatus
+    :param description_for_admins: The description provided by the access
+     review creator and visible to admins.
+    :type description_for_admins: str
+    :param description_for_reviewers: The description provided by the access
+     review creator to be shown to reviewers.
+    :type description_for_reviewers: str
+    :ivar principal_id: The identity id
+    :vartype principal_id: str
+    :ivar principal_type: The identity type : user/servicePrincipal. Possible
+     values include: 'user', 'servicePrincipal'
+    :vartype principal_type: str or
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewActorIdentityType
+    :ivar principal_name: The identity display name
+    :vartype principal_name: str
+    :ivar user_principal_name: The user principal name(if valid)
+    :vartype user_principal_name: str
+    :param mail_notifications_enabled: Flag to indicate whether sending mails
+     to reviewers and the review creator is enabled.
+    :type mail_notifications_enabled: bool
+    :param reminder_notifications_enabled: Flag to indicate whether sending
+     reminder emails to reviewers are enabled.
+    :type reminder_notifications_enabled: bool
+    :param default_decision_enabled: Flag to indicate whether reviewers are
+     required to provide a justification when reviewing access.
+    :type default_decision_enabled: bool
+    :param justification_required_on_approval: Flag to indicate whether the
+     reviewer is required to pass justification when recording a decision.
+    :type justification_required_on_approval: bool
+    :param default_decision: This specifies the behavior for the autoReview
+     feature when an access review completes. Possible values include:
+     'Approve', 'Deny', 'Recommendation'
+    :type default_decision: str or
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.DefaultDecisionType
+    :param auto_apply_decisions_enabled: Flag to indicate whether auto-apply
+     capability, to automatically change the target object access resource, is
+     enabled. If not enabled, a user must, after the review completes, apply
+     the access review.
+    :type auto_apply_decisions_enabled: bool
+    :param recommendations_enabled: Flag to indicate whether showing
+     recommendations to reviewers is enabled.
+    :type recommendations_enabled: bool
+    :param instance_duration_in_days: The duration in days for an instance.
+    :type instance_duration_in_days: int
+    :param type1: The recurrence type : weekly, monthly, etc. Possible values
+     include: 'weekly', 'absoluteMonthly'
+    :type type1: str or
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewRecurrencePatternType
+    :param interval: The interval for recurrence. For a quarterly review, the
+     interval is 3 for type : absoluteMonthly.
+    :type interval: int
+    :param type2: The recurrence range type. The possible values are: endDate,
+     noEnd, numbered. Possible values include: 'endDate', 'noEnd', 'numbered'
+    :type type2: str or
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewRecurrenceRangeType
+    :param number_of_occurrences: The number of times to repeat the access
+     review. Required and must be positive if type is numbered.
+    :type number_of_occurrences: int
+    :param start_date: The DateTime when the review is scheduled to be start.
+     This could be a date in the future. Required on create.
+    :type start_date: datetime
+    :param end_date: The DateTime when the review is scheduled to end.
+     Required if type is endDate
+    :type end_date: datetime
+    :ivar resource_id: ResourceId in which this review is getting created
+    :vartype resource_id: str
+    :ivar role_definition_id: This is used to indicate the role being reviewed
+    :vartype role_definition_id: str
+    :ivar principal_type1: The identity type user/servicePrincipal to review.
+     Possible values include: 'user', 'servicePrincipal'
+    :vartype principal_type1: str or
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewScopePrincipalType
+    :param reviewers: This is the collection of reviewers.
+    :type reviewers:
+     list[~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewReviewer]
+    :ivar reviewers_type: This field specifies the type of reviewers for a
+     review. Usually for a review, reviewers are explicitly assigned. However,
+     in some cases, the reviewers may not be assigned and instead be chosen
+     dynamically. For example managers review or self review. Possible values
+     include: 'Assigned', 'Self', 'Managers'
+    :vartype reviewers_type: str or
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewScheduleDefinitionReviewersType
+    :param instances: This is the collection of instances returned when one
+     does an expand on it.
+    :type instances:
+     list[~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewInstance]
+    """
+
+    _validation = {
+        'id': {'readonly': True},
+        'name': {'readonly': True},
+        'type': {'readonly': True},
+        'status': {'readonly': True},
+        'principal_id': {'readonly': True},
+        'principal_type': {'readonly': True},
+        'principal_name': {'readonly': True},
+        'user_principal_name': {'readonly': True},
+        'resource_id': {'readonly': True},
+        'role_definition_id': {'readonly': True},
+        'principal_type1': {'readonly': True},
+        'reviewers_type': {'readonly': True},
+    }
+
+    _attribute_map = {
+        'id': {'key': 'id', 'type': 'str'},
+        'name': {'key': 'name', 'type': 'str'},
+        'type': {'key': 'type', 'type': 'str'},
+        'display_name': {'key': 'properties.displayName', 'type': 'str'},
+        'status': {'key': 'properties.status', 'type': 'str'},
+        'description_for_admins': {'key': 'properties.descriptionForAdmins', 'type': 'str'},
+        'description_for_reviewers': {'key': 'properties.descriptionForReviewers', 'type': 'str'},
+        'principal_id': {'key': 'properties.createdBy.principalId', 'type': 'str'},
+        'principal_type': {'key': 'properties.createdBy.principalType', 'type': 'str'},
+        'principal_name': {'key': 'properties.createdBy.principalName', 'type': 'str'},
+        'user_principal_name': {'key': 'properties.createdBy.userPrincipalName', 'type': 'str'},
+        'mail_notifications_enabled': {'key': 'properties.settings.mailNotificationsEnabled', 'type': 'bool'},
+        'reminder_notifications_enabled': {'key': 'properties.settings.reminderNotificationsEnabled', 'type': 'bool'},
+        'default_decision_enabled': {'key': 'properties.settings.defaultDecisionEnabled', 'type': 'bool'},
+        'justification_required_on_approval': {'key': 'properties.settings.justificationRequiredOnApproval', 'type': 'bool'},
+        'default_decision': {'key': 'properties.settings.defaultDecision', 'type': 'str'},
+        'auto_apply_decisions_enabled': {'key': 'properties.settings.autoApplyDecisionsEnabled', 'type': 'bool'},
+        'recommendations_enabled': {'key': 'properties.settings.recommendationsEnabled', 'type': 'bool'},
+        'instance_duration_in_days': {'key': 'properties.settings.instanceDurationInDays', 'type': 'int'},
+        'type1': {'key': 'properties.settings.recurrence.pattern.type', 'type': 'str'},
+        'interval': {'key': 'properties.settings.recurrence.pattern.interval', 'type': 'int'},
+        'type2': {'key': 'properties.settings.recurrence.range.type', 'type': 'str'},
+        'number_of_occurrences': {'key': 'properties.settings.recurrence.range.numberOfOccurrences', 'type': 'int'},
+        'start_date': {'key': 'properties.settings.recurrence.range.startDate', 'type': 'iso-8601'},
+        'end_date': {'key': 'properties.settings.recurrence.range.endDate', 'type': 'iso-8601'},
+        'resource_id': {'key': 'properties.scope.resourceId', 'type': 'str'},
+        'role_definition_id': {'key': 'properties.scope.roleDefinitionId', 'type': 'str'},
+        'principal_type1': {'key': 'properties.scope.principalType', 'type': 'str'},
+        'reviewers': {'key': 'properties.reviewers', 'type': '[AccessReviewReviewer]'},
+        'reviewers_type': {'key': 'properties.reviewersType', 'type': 'str'},
+        'instances': {'key': 'properties.instances', 'type': '[AccessReviewInstance]'},
+    }
+
+    def __init__(self, **kwargs):
+        super(AccessReviewScheduleDefinition, self).__init__(**kwargs)
+        self.id = None
+        self.name = None
+        self.type = None
+        self.display_name = kwargs.get('display_name', None)
+        self.status = None
+        self.description_for_admins = kwargs.get('description_for_admins', None)
+        self.description_for_reviewers = kwargs.get('description_for_reviewers', None)
+        self.principal_id = None
+        self.principal_type = None
+        self.principal_name = None
+        self.user_principal_name = None
+        self.mail_notifications_enabled = kwargs.get('mail_notifications_enabled', None)
+        self.reminder_notifications_enabled = kwargs.get('reminder_notifications_enabled', None)
+        self.default_decision_enabled = kwargs.get('default_decision_enabled', None)
+        self.justification_required_on_approval = kwargs.get('justification_required_on_approval', None)
+        self.default_decision = kwargs.get('default_decision', None)
+        self.auto_apply_decisions_enabled = kwargs.get('auto_apply_decisions_enabled', None)
+        self.recommendations_enabled = kwargs.get('recommendations_enabled', None)
+        self.instance_duration_in_days = kwargs.get('instance_duration_in_days', None)
+        self.type1 = kwargs.get('type1', None)
+        self.interval = kwargs.get('interval', None)
+        self.type2 = kwargs.get('type2', None)
+        self.number_of_occurrences = kwargs.get('number_of_occurrences', None)
+        self.start_date = kwargs.get('start_date', None)
+        self.end_date = kwargs.get('end_date', None)
+        self.resource_id = None
+        self.role_definition_id = None
+        self.principal_type1 = None
+        self.reviewers = kwargs.get('reviewers', None)
+        self.reviewers_type = None
+        self.instances = kwargs.get('instances', None)
+
+
+class AccessReviewScheduleDefinitionProperties(Model):
+    """Access Review.
+
+    Variables are only populated by the server, and will be ignored when
+    sending a request.
+
+    :param display_name: The display name for the schedule definition.
+    :type display_name: str
+    :ivar status: This read-only field specifies the status of an
+     accessReview. Possible values include: 'NotStarted', 'InProgress',
+     'Completed', 'Applied', 'Initializing', 'Applying', 'Completing',
+     'Scheduled', 'AutoReviewing', 'AutoReviewed', 'Starting'
+    :vartype status: str or
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewScheduleDefinitionStatus
+    :param description_for_admins: The description provided by the access
+     review creator and visible to admins.
+    :type description_for_admins: str
+    :param description_for_reviewers: The description provided by the access
+     review creator to be shown to reviewers.
+    :type description_for_reviewers: str
+    :ivar principal_id: The identity id
+    :vartype principal_id: str
+    :ivar principal_type: The identity type : user/servicePrincipal. Possible
+     values include: 'user', 'servicePrincipal'
+    :vartype principal_type: str or
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewActorIdentityType
+    :ivar principal_name: The identity display name
+    :vartype principal_name: str
+    :ivar user_principal_name: The user principal name(if valid)
+    :vartype user_principal_name: str
+    :param mail_notifications_enabled: Flag to indicate whether sending mails
+     to reviewers and the review creator is enabled.
+    :type mail_notifications_enabled: bool
+    :param reminder_notifications_enabled: Flag to indicate whether sending
+     reminder emails to reviewers are enabled.
+    :type reminder_notifications_enabled: bool
+    :param default_decision_enabled: Flag to indicate whether reviewers are
+     required to provide a justification when reviewing access.
+    :type default_decision_enabled: bool
+    :param justification_required_on_approval: Flag to indicate whether the
+     reviewer is required to pass justification when recording a decision.
+    :type justification_required_on_approval: bool
+    :param default_decision: This specifies the behavior for the autoReview
+     feature when an access review completes. Possible values include:
+     'Approve', 'Deny', 'Recommendation'
+    :type default_decision: str or
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.DefaultDecisionType
+    :param auto_apply_decisions_enabled: Flag to indicate whether auto-apply
+     capability, to automatically change the target object access resource, is
+     enabled. If not enabled, a user must, after the review completes, apply
+     the access review.
+    :type auto_apply_decisions_enabled: bool
+    :param recommendations_enabled: Flag to indicate whether showing
+     recommendations to reviewers is enabled.
+    :type recommendations_enabled: bool
+    :param instance_duration_in_days: The duration in days for an instance.
+    :type instance_duration_in_days: int
+    :param type: The recurrence type : weekly, monthly, etc. Possible values
+     include: 'weekly', 'absoluteMonthly'
+    :type type: str or
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewRecurrencePatternType
+    :param interval: The interval for recurrence. For a quarterly review, the
+     interval is 3 for type : absoluteMonthly.
+    :type interval: int
+    :param type1: The recurrence range type. The possible values are: endDate,
+     noEnd, numbered. Possible values include: 'endDate', 'noEnd', 'numbered'
+    :type type1: str or
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewRecurrenceRangeType
+    :param number_of_occurrences: The number of times to repeat the access
+     review. Required and must be positive if type is numbered.
+    :type number_of_occurrences: int
+    :param start_date: The DateTime when the review is scheduled to be start.
+     This could be a date in the future. Required on create.
+    :type start_date: datetime
+    :param end_date: The DateTime when the review is scheduled to end.
+     Required if type is endDate
+    :type end_date: datetime
+    :ivar resource_id: ResourceId in which this review is getting created
+    :vartype resource_id: str
+    :ivar role_definition_id: This is used to indicate the role being reviewed
+    :vartype role_definition_id: str
+    :ivar principal_type1: The identity type user/servicePrincipal to review.
+     Possible values include: 'user', 'servicePrincipal'
+    :vartype principal_type1: str or
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewScopePrincipalType
+    :param reviewers: This is the collection of reviewers.
+    :type reviewers:
+     list[~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewReviewer]
+    :ivar reviewers_type: This field specifies the type of reviewers for a
+     review. Usually for a review, reviewers are explicitly assigned. However,
+     in some cases, the reviewers may not be assigned and instead be chosen
+     dynamically. For example managers review or self review. Possible values
+     include: 'Assigned', 'Self', 'Managers'
+    :vartype reviewers_type: str or
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewScheduleDefinitionReviewersType
+    :param instances: This is the collection of instances returned when one
+     does an expand on it.
+    :type instances:
+     list[~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewInstance]
+    """
+
+    _validation = {
+        'status': {'readonly': True},
+        'principal_id': {'readonly': True},
+        'principal_type': {'readonly': True},
+        'principal_name': {'readonly': True},
+        'user_principal_name': {'readonly': True},
+        'resource_id': {'readonly': True},
+        'role_definition_id': {'readonly': True},
+        'principal_type1': {'readonly': True},
+        'reviewers_type': {'readonly': True},
+    }
+
+    _attribute_map = {
+        'display_name': {'key': 'displayName', 'type': 'str'},
+        'status': {'key': 'status', 'type': 'str'},
+        'description_for_admins': {'key': 'descriptionForAdmins', 'type': 'str'},
+        'description_for_reviewers': {'key': 'descriptionForReviewers', 'type': 'str'},
+        'principal_id': {'key': 'createdBy.principalId', 'type': 'str'},
+        'principal_type': {'key': 'createdBy.principalType', 'type': 'str'},
+        'principal_name': {'key': 'createdBy.principalName', 'type': 'str'},
+        'user_principal_name': {'key': 'createdBy.userPrincipalName', 'type': 'str'},
+        'mail_notifications_enabled': {'key': 'settings.mailNotificationsEnabled', 'type': 'bool'},
+        'reminder_notifications_enabled': {'key': 'settings.reminderNotificationsEnabled', 'type': 'bool'},
+        'default_decision_enabled': {'key': 'settings.defaultDecisionEnabled', 'type': 'bool'},
+        'justification_required_on_approval': {'key': 'settings.justificationRequiredOnApproval', 'type': 'bool'},
+        'default_decision': {'key': 'settings.defaultDecision', 'type': 'str'},
+        'auto_apply_decisions_enabled': {'key': 'settings.autoApplyDecisionsEnabled', 'type': 'bool'},
+        'recommendations_enabled': {'key': 'settings.recommendationsEnabled', 'type': 'bool'},
+        'instance_duration_in_days': {'key': 'settings.instanceDurationInDays', 'type': 'int'},
+        'type': {'key': 'settings.recurrence.pattern.type', 'type': 'str'},
+        'interval': {'key': 'settings.recurrence.pattern.interval', 'type': 'int'},
+        'type1': {'key': 'settings.recurrence.range.type', 'type': 'str'},
+        'number_of_occurrences': {'key': 'settings.recurrence.range.numberOfOccurrences', 'type': 'int'},
+        'start_date': {'key': 'settings.recurrence.range.startDate', 'type': 'iso-8601'},
+        'end_date': {'key': 'settings.recurrence.range.endDate', 'type': 'iso-8601'},
+        'resource_id': {'key': 'scope.resourceId', 'type': 'str'},
+        'role_definition_id': {'key': 'scope.roleDefinitionId', 'type': 'str'},
+        'principal_type1': {'key': 'scope.principalType', 'type': 'str'},
+        'reviewers': {'key': 'reviewers', 'type': '[AccessReviewReviewer]'},
+        'reviewers_type': {'key': 'reviewersType', 'type': 'str'},
+        'instances': {'key': 'instances', 'type': '[AccessReviewInstance]'},
+    }
+
+    def __init__(self, **kwargs):
+        super(AccessReviewScheduleDefinitionProperties, self).__init__(**kwargs)
+        self.display_name = kwargs.get('display_name', None)
+        self.status = None
+        self.description_for_admins = kwargs.get('description_for_admins', None)
+        self.description_for_reviewers = kwargs.get('description_for_reviewers', None)
+        self.principal_id = None
+        self.principal_type = None
+        self.principal_name = None
+        self.user_principal_name = None
+        self.mail_notifications_enabled = kwargs.get('mail_notifications_enabled', None)
+        self.reminder_notifications_enabled = kwargs.get('reminder_notifications_enabled', None)
+        self.default_decision_enabled = kwargs.get('default_decision_enabled', None)
+        self.justification_required_on_approval = kwargs.get('justification_required_on_approval', None)
+        self.default_decision = kwargs.get('default_decision', None)
+        self.auto_apply_decisions_enabled = kwargs.get('auto_apply_decisions_enabled', None)
+        self.recommendations_enabled = kwargs.get('recommendations_enabled', None)
+        self.instance_duration_in_days = kwargs.get('instance_duration_in_days', None)
+        self.type = kwargs.get('type', None)
+        self.interval = kwargs.get('interval', None)
+        self.type1 = kwargs.get('type1', None)
+        self.number_of_occurrences = kwargs.get('number_of_occurrences', None)
+        self.start_date = kwargs.get('start_date', None)
+        self.end_date = kwargs.get('end_date', None)
+        self.resource_id = None
+        self.role_definition_id = None
+        self.principal_type1 = None
+        self.reviewers = kwargs.get('reviewers', None)
+        self.reviewers_type = None
+        self.instances = kwargs.get('instances', None)
+
+
+class AccessReviewScheduleSettings(Model):
+    """Settings of an Access Review.
+
+    :param mail_notifications_enabled: Flag to indicate whether sending mails
+     to reviewers and the review creator is enabled.
+    :type mail_notifications_enabled: bool
+    :param reminder_notifications_enabled: Flag to indicate whether sending
+     reminder emails to reviewers are enabled.
+    :type reminder_notifications_enabled: bool
+    :param default_decision_enabled: Flag to indicate whether reviewers are
+     required to provide a justification when reviewing access.
+    :type default_decision_enabled: bool
+    :param justification_required_on_approval: Flag to indicate whether the
+     reviewer is required to pass justification when recording a decision.
+    :type justification_required_on_approval: bool
+    :param default_decision: This specifies the behavior for the autoReview
+     feature when an access review completes. Possible values include:
+     'Approve', 'Deny', 'Recommendation'
+    :type default_decision: str or
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.DefaultDecisionType
+    :param auto_apply_decisions_enabled: Flag to indicate whether auto-apply
+     capability, to automatically change the target object access resource, is
+     enabled. If not enabled, a user must, after the review completes, apply
+     the access review.
+    :type auto_apply_decisions_enabled: bool
+    :param recommendations_enabled: Flag to indicate whether showing
+     recommendations to reviewers is enabled.
+    :type recommendations_enabled: bool
+    :param instance_duration_in_days: The duration in days for an instance.
+    :type instance_duration_in_days: int
+    :param recurrence: Access Review Settings.
+    :type recurrence:
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewRecurrenceSettings
+    """
+
+    _attribute_map = {
+        'mail_notifications_enabled': {'key': 'mailNotificationsEnabled', 'type': 'bool'},
+        'reminder_notifications_enabled': {'key': 'reminderNotificationsEnabled', 'type': 'bool'},
+        'default_decision_enabled': {'key': 'defaultDecisionEnabled', 'type': 'bool'},
+        'justification_required_on_approval': {'key': 'justificationRequiredOnApproval', 'type': 'bool'},
+        'default_decision': {'key': 'defaultDecision', 'type': 'str'},
+        'auto_apply_decisions_enabled': {'key': 'autoApplyDecisionsEnabled', 'type': 'bool'},
+        'recommendations_enabled': {'key': 'recommendationsEnabled', 'type': 'bool'},
+        'instance_duration_in_days': {'key': 'instanceDurationInDays', 'type': 'int'},
+        'recurrence': {'key': 'recurrence', 'type': 'AccessReviewRecurrenceSettings'},
+    }
+
+    def __init__(self, **kwargs):
+        super(AccessReviewScheduleSettings, self).__init__(**kwargs)
+        self.mail_notifications_enabled = kwargs.get('mail_notifications_enabled', None)
+        self.reminder_notifications_enabled = kwargs.get('reminder_notifications_enabled', None)
+        self.default_decision_enabled = kwargs.get('default_decision_enabled', None)
+        self.justification_required_on_approval = kwargs.get('justification_required_on_approval', None)
+        self.default_decision = kwargs.get('default_decision', None)
+        self.auto_apply_decisions_enabled = kwargs.get('auto_apply_decisions_enabled', None)
+        self.recommendations_enabled = kwargs.get('recommendations_enabled', None)
+        self.instance_duration_in_days = kwargs.get('instance_duration_in_days', None)
+        self.recurrence = kwargs.get('recurrence', None)
+
+
+class CloudError(Model):
+    """CloudError.
+    """
+
+    _attribute_map = {
+    }
+
+
+class ErrorDefinition(Model):
+    """Error.
+
+    Error description and code explaining why an operation failed.
+
+    :param error: Error of the list gateway status.
+    :type error:
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.ErrorDefinitionProperties
+    """
+
+    _attribute_map = {
+        'error': {'key': 'error', 'type': 'ErrorDefinitionProperties'},
+    }
+
+    def __init__(self, **kwargs):
+        super(ErrorDefinition, self).__init__(**kwargs)
+        self.error = kwargs.get('error', None)
+
+
+class ErrorDefinitionException(HttpOperationError):
+    """Server responsed with exception of type: 'ErrorDefinition'.
+
+    :param deserialize: A deserializer
+    :param response: Server response to be deserialized.
+    """
+
+    def __init__(self, deserialize, response, *args):
+
+        super(ErrorDefinitionException, self).__init__(deserialize, response, 'ErrorDefinition', *args)
+
+
+class ErrorDefinitionProperties(Model):
+    """Error.
+
+    Error description and code explaining why an operation failed.
+
+    Variables are only populated by the server, and will be ignored when
+    sending a request.
+
+    :ivar message: Description of the error.
+    :vartype message: str
+    :param code: Error code of list gateway.
+    :type code: str
+    """
+
+    _validation = {
+        'message': {'readonly': True},
+    }
+
+    _attribute_map = {
+        'message': {'key': 'message', 'type': 'str'},
+        'code': {'key': 'code', 'type': 'str'},
+    }
+
+    def __init__(self, **kwargs):
+        super(ErrorDefinitionProperties, self).__init__(**kwargs)
+        self.message = None
+        self.code = kwargs.get('code', None)
+
+
+class Operation(Model):
+    """The definition of a Microsoft.Authorization operation.
+
+    :param name: Name of the operation
+    :type name: str
+    :param is_data_action: Indicates whether the operation is a data action
+    :type is_data_action: bool
+    :param display: Display of the operation
+    :type display:
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.OperationDisplay
+    :param origin: Origin of the operation
+    :type origin: str
+    """
+
+    _attribute_map = {
+        'name': {'key': 'name', 'type': 'str'},
+        'is_data_action': {'key': 'isDataAction', 'type': 'bool'},
+        'display': {'key': 'display', 'type': 'OperationDisplay'},
+        'origin': {'key': 'origin', 'type': 'str'},
+    }
+
+    def __init__(self, **kwargs):
+        super(Operation, self).__init__(**kwargs)
+        self.name = kwargs.get('name', None)
+        self.is_data_action = kwargs.get('is_data_action', None)
+        self.display = kwargs.get('display', None)
+        self.origin = kwargs.get('origin', None)
+
+
+class OperationDisplay(Model):
+    """The display information for a Microsoft.Authorization operation.
+
+    Variables are only populated by the server, and will be ignored when
+    sending a request.
+
+    :ivar provider: The resource provider name: Microsoft.Authorization.
+    :vartype provider: str
+    :ivar resource: The resource on which the operation is performed.
+    :vartype resource: str
+    :ivar operation: The operation that users can perform.
+    :vartype operation: str
+    :ivar description: The description for the operation.
+    :vartype description: str
+    """
+
+    _validation = {
+        'provider': {'readonly': True},
+        'resource': {'readonly': True},
+        'operation': {'readonly': True},
+        'description': {'readonly': True},
+    }
+
+    _attribute_map = {
+        'provider': {'key': 'provider', 'type': 'str'},
+        'resource': {'key': 'resource', 'type': 'str'},
+        'operation': {'key': 'operation', 'type': 'str'},
+        'description': {'key': 'description', 'type': 'str'},
+    }
+
+    def __init__(self, **kwargs):
+        super(OperationDisplay, self).__init__(**kwargs)
+        self.provider = None
+        self.resource = None
+        self.operation = None
+        self.description = None
+
+
+class ServicePrincipalDecisionTarget(AccessReviewDecisionTarget):
+    """Service Principal Decision Target.
+
+    Variables are only populated by the server, and will be ignored when
+    sending a request.
+
+    All required parameters must be populated in order to send to Azure.
+
+    :param type: Required. Constant filled by server.
+    :type type: str
+    :ivar principal_id: The id of service principal whose access is reviewed.
+    :vartype principal_id: str
+    :ivar principal_name: The display name of the service principal whose
+     access was reviewed.
+    :vartype principal_name: str
+    :ivar app_id: The appId for the service principal entity being reviewed
+    :vartype app_id: str
+    """
+
+    _validation = {
+        'type': {'required': True},
+        'principal_id': {'readonly': True},
+        'principal_name': {'readonly': True},
+        'app_id': {'readonly': True},
+    }
+
+    _attribute_map = {
+        'type': {'key': 'type', 'type': 'str'},
+        'principal_id': {'key': 'principalId', 'type': 'str'},
+        'principal_name': {'key': 'principalName', 'type': 'str'},
+        'app_id': {'key': 'appId', 'type': 'str'},
+    }
+
+    def __init__(self, **kwargs):
+        super(ServicePrincipalDecisionTarget, self).__init__(**kwargs)
+        self.principal_id = None
+        self.principal_name = None
+        self.app_id = None
+        self.type = 'servicePrincipal'
+
+
+class UserDecisionTarget(AccessReviewDecisionTarget):
+    """User Decision Target.
+
+    Variables are only populated by the server, and will be ignored when
+    sending a request.
+
+    All required parameters must be populated in order to send to Azure.
+
+    :param type: Required. Constant filled by server.
+    :type type: str
+    :ivar principal_id: The id of user whose access was reviewed.
+    :vartype principal_id: str
+    :ivar principal_name: The display name of the user whose access was
+     reviewed.
+    :vartype principal_name: str
+    :ivar user_principal_name: The user principal name of the user whose
+     access was reviewed.
+    :vartype user_principal_name: str
+    """
+
+    _validation = {
+        'type': {'required': True},
+        'principal_id': {'readonly': True},
+        'principal_name': {'readonly': True},
+        'user_principal_name': {'readonly': True},
+    }
+
+    _attribute_map = {
+        'type': {'key': 'type', 'type': 'str'},
+        'principal_id': {'key': 'principalId', 'type': 'str'},
+        'principal_name': {'key': 'principalName', 'type': 'str'},
+        'user_principal_name': {'key': 'userPrincipalName', 'type': 'str'},
+    }
+
+    def __init__(self, **kwargs):
+        super(UserDecisionTarget, self).__init__(**kwargs)
+        self.principal_id = None
+        self.principal_name = None
+        self.user_principal_name = None
+        self.type = 'user'
diff --git a/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2018_05_01_preview/models/_models_py3.py b/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2018_05_01_preview/models/_models_py3.py
new file mode 100644
index 0000000000000..ddf2d9365d2f0
--- /dev/null
+++ b/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2018_05_01_preview/models/_models_py3.py
@@ -0,0 +1,1095 @@
+# coding=utf-8
+# --------------------------------------------------------------------------
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License. See License.txt in the project root for
+# license information.
+#
+# Code generated by Microsoft (R) AutoRest Code Generator.
+# Changes may cause incorrect behavior and will be lost if the code is
+# regenerated.
+# --------------------------------------------------------------------------
+
+from msrest.serialization import Model
+from msrest.exceptions import HttpOperationError
+
+
+class AccessReviewDecision(Model):
+    """Access Review.
+
+    Variables are only populated by the server, and will be ignored when
+    sending a request.
+
+    :ivar id: The access review decision id.
+    :vartype id: str
+    :ivar name: The access review decision name.
+    :vartype name: str
+    :ivar type: The resource type.
+    :vartype type: str
+    :ivar recommendation: The feature- generated recommendation shown to the
+     reviewer. Possible values include: 'Approve', 'Deny', 'NoInfoAvailable'
+    :vartype recommendation: str or
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessRecommendationType
+    :param decision: The decision on the approval step. This value is
+     initially set to NotReviewed. Approvers can take action of Approve/Deny.
+     Possible values include: 'Approve', 'Deny', 'NotReviewed', 'DontKnow',
+     'NotNotified'
+    :type decision: str or
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewResult
+    :param justification: Justification provided by approvers for their action
+    :type justification: str
+    :ivar reviewed_date_time: Date Time when a decision was taken.
+    :vartype reviewed_date_time: datetime
+    :ivar principal_id: The identity id
+    :vartype principal_id: str
+    :ivar principal_type: The identity type : user/servicePrincipal. Possible
+     values include: 'user', 'servicePrincipal'
+    :vartype principal_type: str or
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewActorIdentityType
+    :ivar principal_name: The identity display name
+    :vartype principal_name: str
+    :ivar user_principal_name: The user principal name(if valid)
+    :vartype user_principal_name: str
+    :ivar apply_result: The outcome of applying the decision. Possible values
+     include: 'New', 'Applying', 'AppliedSuccessfully',
+     'AppliedWithUnknownFailure', 'AppliedSuccessfullyButObjectNotFound',
+     'ApplyNotSupported'
+    :vartype apply_result: str or
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewApplyResult
+    :ivar applied_date_time: The date and time when the review decision was
+     applied.
+    :vartype applied_date_time: datetime
+    :ivar principal_id1: The identity id
+    :vartype principal_id1: str
+    :ivar principal_type1: The identity type : user/servicePrincipal. Possible
+     values include: 'user', 'servicePrincipal'
+    :vartype principal_type1: str or
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewActorIdentityType
+    :ivar principal_name1: The identity display name
+    :vartype principal_name1: str
+    :ivar user_principal_name1: The user principal name(if valid)
+    :vartype user_principal_name1: str
+    """
+
+    _validation = {
+        'id': {'readonly': True},
+        'name': {'readonly': True},
+        'type': {'readonly': True},
+        'recommendation': {'readonly': True},
+        'reviewed_date_time': {'readonly': True},
+        'principal_id': {'readonly': True},
+        'principal_type': {'readonly': True},
+        'principal_name': {'readonly': True},
+        'user_principal_name': {'readonly': True},
+        'apply_result': {'readonly': True},
+        'applied_date_time': {'readonly': True},
+        'principal_id1': {'readonly': True},
+        'principal_type1': {'readonly': True},
+        'principal_name1': {'readonly': True},
+        'user_principal_name1': {'readonly': True},
+    }
+
+    _attribute_map = {
+        'id': {'key': 'id', 'type': 'str'},
+        'name': {'key': 'name', 'type': 'str'},
+        'type': {'key': 'type', 'type': 'str'},
+        'recommendation': {'key': 'properties.recommendation', 'type': 'str'},
+        'decision': {'key': 'properties.decision', 'type': 'str'},
+        'justification': {'key': 'properties.justification', 'type': 'str'},
+        'reviewed_date_time': {'key': 'properties.reviewedDateTime', 'type': 'iso-8601'},
+        'principal_id': {'key': 'properties.reviewedBy.principalId', 'type': 'str'},
+        'principal_type': {'key': 'properties.reviewedBy.principalType', 'type': 'str'},
+        'principal_name': {'key': 'properties.reviewedBy.principalName', 'type': 'str'},
+        'user_principal_name': {'key': 'properties.reviewedBy.userPrincipalName', 'type': 'str'},
+        'apply_result': {'key': 'properties.applyResult', 'type': 'str'},
+        'applied_date_time': {'key': 'properties.appliedDateTime', 'type': 'iso-8601'},
+        'principal_id1': {'key': 'properties.appliedBy.principalId', 'type': 'str'},
+        'principal_type1': {'key': 'properties.appliedBy.principalType', 'type': 'str'},
+        'principal_name1': {'key': 'properties.appliedBy.principalName', 'type': 'str'},
+        'user_principal_name1': {'key': 'properties.appliedBy.userPrincipalName', 'type': 'str'},
+    }
+
+    def __init__(self, *, decision=None, justification: str=None, **kwargs) -> None:
+        super(AccessReviewDecision, self).__init__(**kwargs)
+        self.id = None
+        self.name = None
+        self.type = None
+        self.recommendation = None
+        self.decision = decision
+        self.justification = justification
+        self.reviewed_date_time = None
+        self.principal_id = None
+        self.principal_type = None
+        self.principal_name = None
+        self.user_principal_name = None
+        self.apply_result = None
+        self.applied_date_time = None
+        self.principal_id1 = None
+        self.principal_type1 = None
+        self.principal_name1 = None
+        self.user_principal_name1 = None
+
+
+class AccessReviewDecisionProperties(Model):
+    """Approval Step.
+
+    Variables are only populated by the server, and will be ignored when
+    sending a request.
+
+    :ivar recommendation: The feature- generated recommendation shown to the
+     reviewer. Possible values include: 'Approve', 'Deny', 'NoInfoAvailable'
+    :vartype recommendation: str or
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessRecommendationType
+    :param decision: The decision on the approval step. This value is
+     initially set to NotReviewed. Approvers can take action of Approve/Deny.
+     Possible values include: 'Approve', 'Deny', 'NotReviewed', 'DontKnow',
+     'NotNotified'
+    :type decision: str or
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewResult
+    :param justification: Justification provided by approvers for their action
+    :type justification: str
+    :ivar reviewed_date_time: Date Time when a decision was taken.
+    :vartype reviewed_date_time: datetime
+    :ivar principal_id: The identity id
+    :vartype principal_id: str
+    :ivar principal_type: The identity type : user/servicePrincipal. Possible
+     values include: 'user', 'servicePrincipal'
+    :vartype principal_type: str or
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewActorIdentityType
+    :ivar principal_name: The identity display name
+    :vartype principal_name: str
+    :ivar user_principal_name: The user principal name(if valid)
+    :vartype user_principal_name: str
+    :ivar apply_result: The outcome of applying the decision. Possible values
+     include: 'New', 'Applying', 'AppliedSuccessfully',
+     'AppliedWithUnknownFailure', 'AppliedSuccessfullyButObjectNotFound',
+     'ApplyNotSupported'
+    :vartype apply_result: str or
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewApplyResult
+    :ivar applied_date_time: The date and time when the review decision was
+     applied.
+    :vartype applied_date_time: datetime
+    :ivar principal_id1: The identity id
+    :vartype principal_id1: str
+    :ivar principal_type1: The identity type : user/servicePrincipal. Possible
+     values include: 'user', 'servicePrincipal'
+    :vartype principal_type1: str or
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewActorIdentityType
+    :ivar principal_name1: The identity display name
+    :vartype principal_name1: str
+    :ivar user_principal_name1: The user principal name(if valid)
+    :vartype user_principal_name1: str
+    """
+
+    _validation = {
+        'recommendation': {'readonly': True},
+        'reviewed_date_time': {'readonly': True},
+        'principal_id': {'readonly': True},
+        'principal_type': {'readonly': True},
+        'principal_name': {'readonly': True},
+        'user_principal_name': {'readonly': True},
+        'apply_result': {'readonly': True},
+        'applied_date_time': {'readonly': True},
+        'principal_id1': {'readonly': True},
+        'principal_type1': {'readonly': True},
+        'principal_name1': {'readonly': True},
+        'user_principal_name1': {'readonly': True},
+    }
+
+    _attribute_map = {
+        'recommendation': {'key': 'recommendation', 'type': 'str'},
+        'decision': {'key': 'decision', 'type': 'str'},
+        'justification': {'key': 'justification', 'type': 'str'},
+        'reviewed_date_time': {'key': 'reviewedDateTime', 'type': 'iso-8601'},
+        'principal_id': {'key': 'reviewedBy.principalId', 'type': 'str'},
+        'principal_type': {'key': 'reviewedBy.principalType', 'type': 'str'},
+        'principal_name': {'key': 'reviewedBy.principalName', 'type': 'str'},
+        'user_principal_name': {'key': 'reviewedBy.userPrincipalName', 'type': 'str'},
+        'apply_result': {'key': 'applyResult', 'type': 'str'},
+        'applied_date_time': {'key': 'appliedDateTime', 'type': 'iso-8601'},
+        'principal_id1': {'key': 'appliedBy.principalId', 'type': 'str'},
+        'principal_type1': {'key': 'appliedBy.principalType', 'type': 'str'},
+        'principal_name1': {'key': 'appliedBy.principalName', 'type': 'str'},
+        'user_principal_name1': {'key': 'appliedBy.userPrincipalName', 'type': 'str'},
+    }
+
+    def __init__(self, *, decision=None, justification: str=None, **kwargs) -> None:
+        super(AccessReviewDecisionProperties, self).__init__(**kwargs)
+        self.recommendation = None
+        self.decision = decision
+        self.justification = justification
+        self.reviewed_date_time = None
+        self.principal_id = None
+        self.principal_type = None
+        self.principal_name = None
+        self.user_principal_name = None
+        self.apply_result = None
+        self.applied_date_time = None
+        self.principal_id1 = None
+        self.principal_type1 = None
+        self.principal_name1 = None
+        self.user_principal_name1 = None
+
+
+class AccessReviewDecisionTarget(Model):
+    """Target of the decision.
+
+    You probably want to use the sub-classes and not this class directly. Known
+    sub-classes are: UserDecisionTarget, ServicePrincipalDecisionTarget
+
+    All required parameters must be populated in order to send to Azure.
+
+    :param type: Required. Constant filled by server.
+    :type type: str
+    """
+
+    _validation = {
+        'type': {'required': True},
+    }
+
+    _attribute_map = {
+        'type': {'key': 'type', 'type': 'str'},
+    }
+
+    _subtype_map = {
+        'type': {'user': 'UserDecisionTarget', 'servicePrincipal': 'ServicePrincipalDecisionTarget'}
+    }
+
+    def __init__(self, **kwargs) -> None:
+        super(AccessReviewDecisionTarget, self).__init__(**kwargs)
+        self.type = None
+
+
+class AccessReviewDefaultSettings(Model):
+    """Access Review Default Settings.
+
+    Variables are only populated by the server, and will be ignored when
+    sending a request.
+
+    :ivar id: The access review default settings id. This is only going to be
+     default
+    :vartype id: str
+    :ivar name: The access review default settings name. This is always going
+     to be Access Review Default Settings
+    :vartype name: str
+    :ivar type: The resource type.
+    :vartype type: str
+    :param mail_notifications_enabled: Flag to indicate whether sending mails
+     to reviewers and the review creator is enabled.
+    :type mail_notifications_enabled: bool
+    :param reminder_notifications_enabled: Flag to indicate whether sending
+     reminder emails to reviewers are enabled.
+    :type reminder_notifications_enabled: bool
+    :param default_decision_enabled: Flag to indicate whether reviewers are
+     required to provide a justification when reviewing access.
+    :type default_decision_enabled: bool
+    :param justification_required_on_approval: Flag to indicate whether the
+     reviewer is required to pass justification when recording a decision.
+    :type justification_required_on_approval: bool
+    :param default_decision: This specifies the behavior for the autoReview
+     feature when an access review completes. Possible values include:
+     'Approve', 'Deny', 'Recommendation'
+    :type default_decision: str or
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.DefaultDecisionType
+    :param auto_apply_decisions_enabled: Flag to indicate whether auto-apply
+     capability, to automatically change the target object access resource, is
+     enabled. If not enabled, a user must, after the review completes, apply
+     the access review.
+    :type auto_apply_decisions_enabled: bool
+    :param recommendations_enabled: Flag to indicate whether showing
+     recommendations to reviewers is enabled.
+    :type recommendations_enabled: bool
+    :param instance_duration_in_days: The duration in days for an instance.
+    :type instance_duration_in_days: int
+    :param type1: The recurrence type : weekly, monthly, etc. Possible values
+     include: 'weekly', 'absoluteMonthly'
+    :type type1: str or
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewRecurrencePatternType
+    :param interval: The interval for recurrence. For a quarterly review, the
+     interval is 3 for type : absoluteMonthly.
+    :type interval: int
+    :param type2: The recurrence range type. The possible values are: endDate,
+     noEnd, numbered. Possible values include: 'endDate', 'noEnd', 'numbered'
+    :type type2: str or
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewRecurrenceRangeType
+    :param number_of_occurrences: The number of times to repeat the access
+     review. Required and must be positive if type is numbered.
+    :type number_of_occurrences: int
+    :param start_date: The DateTime when the review is scheduled to be start.
+     This could be a date in the future. Required on create.
+    :type start_date: datetime
+    :param end_date: The DateTime when the review is scheduled to end.
+     Required if type is endDate
+    :type end_date: datetime
+    """
+
+    _validation = {
+        'id': {'readonly': True},
+        'name': {'readonly': True},
+        'type': {'readonly': True},
+    }
+
+    _attribute_map = {
+        'id': {'key': 'id', 'type': 'str'},
+        'name': {'key': 'name', 'type': 'str'},
+        'type': {'key': 'type', 'type': 'str'},
+        'mail_notifications_enabled': {'key': 'properties.mailNotificationsEnabled', 'type': 'bool'},
+        'reminder_notifications_enabled': {'key': 'properties.reminderNotificationsEnabled', 'type': 'bool'},
+        'default_decision_enabled': {'key': 'properties.defaultDecisionEnabled', 'type': 'bool'},
+        'justification_required_on_approval': {'key': 'properties.justificationRequiredOnApproval', 'type': 'bool'},
+        'default_decision': {'key': 'properties.defaultDecision', 'type': 'str'},
+        'auto_apply_decisions_enabled': {'key': 'properties.autoApplyDecisionsEnabled', 'type': 'bool'},
+        'recommendations_enabled': {'key': 'properties.recommendationsEnabled', 'type': 'bool'},
+        'instance_duration_in_days': {'key': 'properties.instanceDurationInDays', 'type': 'int'},
+        'type1': {'key': 'properties.recurrence.pattern.type', 'type': 'str'},
+        'interval': {'key': 'properties.recurrence.pattern.interval', 'type': 'int'},
+        'type2': {'key': 'properties.recurrence.range.type', 'type': 'str'},
+        'number_of_occurrences': {'key': 'properties.recurrence.range.numberOfOccurrences', 'type': 'int'},
+        'start_date': {'key': 'properties.recurrence.range.startDate', 'type': 'iso-8601'},
+        'end_date': {'key': 'properties.recurrence.range.endDate', 'type': 'iso-8601'},
+    }
+
+    def __init__(self, *, mail_notifications_enabled: bool=None, reminder_notifications_enabled: bool=None, default_decision_enabled: bool=None, justification_required_on_approval: bool=None, default_decision=None, auto_apply_decisions_enabled: bool=None, recommendations_enabled: bool=None, instance_duration_in_days: int=None, type1=None, interval: int=None, type2=None, number_of_occurrences: int=None, start_date=None, end_date=None, **kwargs) -> None:
+        super(AccessReviewDefaultSettings, self).__init__(**kwargs)
+        self.id = None
+        self.name = None
+        self.type = None
+        self.mail_notifications_enabled = mail_notifications_enabled
+        self.reminder_notifications_enabled = reminder_notifications_enabled
+        self.default_decision_enabled = default_decision_enabled
+        self.justification_required_on_approval = justification_required_on_approval
+        self.default_decision = default_decision
+        self.auto_apply_decisions_enabled = auto_apply_decisions_enabled
+        self.recommendations_enabled = recommendations_enabled
+        self.instance_duration_in_days = instance_duration_in_days
+        self.type1 = type1
+        self.interval = interval
+        self.type2 = type2
+        self.number_of_occurrences = number_of_occurrences
+        self.start_date = start_date
+        self.end_date = end_date
+
+
+class AccessReviewInstance(Model):
+    """Access Review Instance.
+
+    Variables are only populated by the server, and will be ignored when
+    sending a request.
+
+    :ivar id: The access review instance id.
+    :vartype id: str
+    :ivar name: The access review instance name.
+    :vartype name: str
+    :ivar type: The resource type.
+    :vartype type: str
+    :ivar status: This read-only field specifies the status of an access
+     review instance. Possible values include: 'NotStarted', 'InProgress',
+     'Completed', 'Applied', 'Initializing', 'Applying', 'Completing',
+     'Scheduled', 'AutoReviewing', 'AutoReviewed', 'Starting'
+    :vartype status: str or
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewInstanceStatus
+    :param start_date_time: The DateTime when the review instance is scheduled
+     to be start.
+    :type start_date_time: datetime
+    :param end_date_time: The DateTime when the review instance is scheduled
+     to end.
+    :type end_date_time: datetime
+    """
+
+    _validation = {
+        'id': {'readonly': True},
+        'name': {'readonly': True},
+        'type': {'readonly': True},
+        'status': {'readonly': True},
+    }
+
+    _attribute_map = {
+        'id': {'key': 'id', 'type': 'str'},
+        'name': {'key': 'name', 'type': 'str'},
+        'type': {'key': 'type', 'type': 'str'},
+        'status': {'key': 'properties.status', 'type': 'str'},
+        'start_date_time': {'key': 'properties.startDateTime', 'type': 'iso-8601'},
+        'end_date_time': {'key': 'properties.endDateTime', 'type': 'iso-8601'},
+    }
+
+    def __init__(self, *, start_date_time=None, end_date_time=None, **kwargs) -> None:
+        super(AccessReviewInstance, self).__init__(**kwargs)
+        self.id = None
+        self.name = None
+        self.type = None
+        self.status = None
+        self.start_date_time = start_date_time
+        self.end_date_time = end_date_time
+
+
+class AccessReviewReviewer(Model):
+    """Descriptor for what needs to be reviewed.
+
+    Variables are only populated by the server, and will be ignored when
+    sending a request.
+
+    :param principal_id: The id of the reviewer(user/servicePrincipal)
+    :type principal_id: str
+    :ivar principal_type: The identity type : user/servicePrincipal. Possible
+     values include: 'user', 'servicePrincipal'
+    :vartype principal_type: str or
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewReviewerType
+    """
+
+    _validation = {
+        'principal_type': {'readonly': True},
+    }
+
+    _attribute_map = {
+        'principal_id': {'key': 'principalId', 'type': 'str'},
+        'principal_type': {'key': 'principalType', 'type': 'str'},
+    }
+
+    def __init__(self, *, principal_id: str=None, **kwargs) -> None:
+        super(AccessReviewReviewer, self).__init__(**kwargs)
+        self.principal_id = principal_id
+        self.principal_type = None
+
+
+class AccessReviewScheduleDefinition(Model):
+    """Access Review Schedule Definition.
+
+    Variables are only populated by the server, and will be ignored when
+    sending a request.
+
+    :ivar id: The access review schedule definition id.
+    :vartype id: str
+    :ivar name: The access review schedule definition unique id.
+    :vartype name: str
+    :ivar type: The resource type.
+    :vartype type: str
+    :param display_name: The display name for the schedule definition.
+    :type display_name: str
+    :ivar status: This read-only field specifies the status of an
+     accessReview. Possible values include: 'NotStarted', 'InProgress',
+     'Completed', 'Applied', 'Initializing', 'Applying', 'Completing',
+     'Scheduled', 'AutoReviewing', 'AutoReviewed', 'Starting'
+    :vartype status: str or
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewScheduleDefinitionStatus
+    :param description_for_admins: The description provided by the access
+     review creator and visible to admins.
+    :type description_for_admins: str
+    :param description_for_reviewers: The description provided by the access
+     review creator to be shown to reviewers.
+    :type description_for_reviewers: str
+    :ivar principal_id: The identity id
+    :vartype principal_id: str
+    :ivar principal_type: The identity type : user/servicePrincipal. Possible
+     values include: 'user', 'servicePrincipal'
+    :vartype principal_type: str or
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewActorIdentityType
+    :ivar principal_name: The identity display name
+    :vartype principal_name: str
+    :ivar user_principal_name: The user principal name(if valid)
+    :vartype user_principal_name: str
+    :param mail_notifications_enabled: Flag to indicate whether sending mails
+     to reviewers and the review creator is enabled.
+    :type mail_notifications_enabled: bool
+    :param reminder_notifications_enabled: Flag to indicate whether sending
+     reminder emails to reviewers are enabled.
+    :type reminder_notifications_enabled: bool
+    :param default_decision_enabled: Flag to indicate whether reviewers are
+     required to provide a justification when reviewing access.
+    :type default_decision_enabled: bool
+    :param justification_required_on_approval: Flag to indicate whether the
+     reviewer is required to pass justification when recording a decision.
+    :type justification_required_on_approval: bool
+    :param default_decision: This specifies the behavior for the autoReview
+     feature when an access review completes. Possible values include:
+     'Approve', 'Deny', 'Recommendation'
+    :type default_decision: str or
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.DefaultDecisionType
+    :param auto_apply_decisions_enabled: Flag to indicate whether auto-apply
+     capability, to automatically change the target object access resource, is
+     enabled. If not enabled, a user must, after the review completes, apply
+     the access review.
+    :type auto_apply_decisions_enabled: bool
+    :param recommendations_enabled: Flag to indicate whether showing
+     recommendations to reviewers is enabled.
+    :type recommendations_enabled: bool
+    :param instance_duration_in_days: The duration in days for an instance.
+    :type instance_duration_in_days: int
+    :param type1: The recurrence type : weekly, monthly, etc. Possible values
+     include: 'weekly', 'absoluteMonthly'
+    :type type1: str or
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewRecurrencePatternType
+    :param interval: The interval for recurrence. For a quarterly review, the
+     interval is 3 for type : absoluteMonthly.
+    :type interval: int
+    :param type2: The recurrence range type. The possible values are: endDate,
+     noEnd, numbered. Possible values include: 'endDate', 'noEnd', 'numbered'
+    :type type2: str or
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewRecurrenceRangeType
+    :param number_of_occurrences: The number of times to repeat the access
+     review. Required and must be positive if type is numbered.
+    :type number_of_occurrences: int
+    :param start_date: The DateTime when the review is scheduled to be start.
+     This could be a date in the future. Required on create.
+    :type start_date: datetime
+    :param end_date: The DateTime when the review is scheduled to end.
+     Required if type is endDate
+    :type end_date: datetime
+    :ivar resource_id: ResourceId in which this review is getting created
+    :vartype resource_id: str
+    :ivar role_definition_id: This is used to indicate the role being reviewed
+    :vartype role_definition_id: str
+    :ivar principal_type1: The identity type user/servicePrincipal to review.
+     Possible values include: 'user', 'servicePrincipal'
+    :vartype principal_type1: str or
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewScopePrincipalType
+    :param reviewers: This is the collection of reviewers.
+    :type reviewers:
+     list[~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewReviewer]
+    :ivar reviewers_type: This field specifies the type of reviewers for a
+     review. Usually for a review, reviewers are explicitly assigned. However,
+     in some cases, the reviewers may not be assigned and instead be chosen
+     dynamically. For example managers review or self review. Possible values
+     include: 'Assigned', 'Self', 'Managers'
+    :vartype reviewers_type: str or
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewScheduleDefinitionReviewersType
+    :param instances: This is the collection of instances returned when one
+     does an expand on it.
+    :type instances:
+     list[~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewInstance]
+    """
+
+    _validation = {
+        'id': {'readonly': True},
+        'name': {'readonly': True},
+        'type': {'readonly': True},
+        'status': {'readonly': True},
+        'principal_id': {'readonly': True},
+        'principal_type': {'readonly': True},
+        'principal_name': {'readonly': True},
+        'user_principal_name': {'readonly': True},
+        'resource_id': {'readonly': True},
+        'role_definition_id': {'readonly': True},
+        'principal_type1': {'readonly': True},
+        'reviewers_type': {'readonly': True},
+    }
+
+    _attribute_map = {
+        'id': {'key': 'id', 'type': 'str'},
+        'name': {'key': 'name', 'type': 'str'},
+        'type': {'key': 'type', 'type': 'str'},
+        'display_name': {'key': 'properties.displayName', 'type': 'str'},
+        'status': {'key': 'properties.status', 'type': 'str'},
+        'description_for_admins': {'key': 'properties.descriptionForAdmins', 'type': 'str'},
+        'description_for_reviewers': {'key': 'properties.descriptionForReviewers', 'type': 'str'},
+        'principal_id': {'key': 'properties.createdBy.principalId', 'type': 'str'},
+        'principal_type': {'key': 'properties.createdBy.principalType', 'type': 'str'},
+        'principal_name': {'key': 'properties.createdBy.principalName', 'type': 'str'},
+        'user_principal_name': {'key': 'properties.createdBy.userPrincipalName', 'type': 'str'},
+        'mail_notifications_enabled': {'key': 'properties.settings.mailNotificationsEnabled', 'type': 'bool'},
+        'reminder_notifications_enabled': {'key': 'properties.settings.reminderNotificationsEnabled', 'type': 'bool'},
+        'default_decision_enabled': {'key': 'properties.settings.defaultDecisionEnabled', 'type': 'bool'},
+        'justification_required_on_approval': {'key': 'properties.settings.justificationRequiredOnApproval', 'type': 'bool'},
+        'default_decision': {'key': 'properties.settings.defaultDecision', 'type': 'str'},
+        'auto_apply_decisions_enabled': {'key': 'properties.settings.autoApplyDecisionsEnabled', 'type': 'bool'},
+        'recommendations_enabled': {'key': 'properties.settings.recommendationsEnabled', 'type': 'bool'},
+        'instance_duration_in_days': {'key': 'properties.settings.instanceDurationInDays', 'type': 'int'},
+        'type1': {'key': 'properties.settings.recurrence.pattern.type', 'type': 'str'},
+        'interval': {'key': 'properties.settings.recurrence.pattern.interval', 'type': 'int'},
+        'type2': {'key': 'properties.settings.recurrence.range.type', 'type': 'str'},
+        'number_of_occurrences': {'key': 'properties.settings.recurrence.range.numberOfOccurrences', 'type': 'int'},
+        'start_date': {'key': 'properties.settings.recurrence.range.startDate', 'type': 'iso-8601'},
+        'end_date': {'key': 'properties.settings.recurrence.range.endDate', 'type': 'iso-8601'},
+        'resource_id': {'key': 'properties.scope.resourceId', 'type': 'str'},
+        'role_definition_id': {'key': 'properties.scope.roleDefinitionId', 'type': 'str'},
+        'principal_type1': {'key': 'properties.scope.principalType', 'type': 'str'},
+        'reviewers': {'key': 'properties.reviewers', 'type': '[AccessReviewReviewer]'},
+        'reviewers_type': {'key': 'properties.reviewersType', 'type': 'str'},
+        'instances': {'key': 'properties.instances', 'type': '[AccessReviewInstance]'},
+    }
+
+    def __init__(self, *, display_name: str=None, description_for_admins: str=None, description_for_reviewers: str=None, mail_notifications_enabled: bool=None, reminder_notifications_enabled: bool=None, default_decision_enabled: bool=None, justification_required_on_approval: bool=None, default_decision=None, auto_apply_decisions_enabled: bool=None, recommendations_enabled: bool=None, instance_duration_in_days: int=None, type1=None, interval: int=None, type2=None, number_of_occurrences: int=None, start_date=None, end_date=None, reviewers=None, instances=None, **kwargs) -> None:
+        super(AccessReviewScheduleDefinition, self).__init__(**kwargs)
+        self.id = None
+        self.name = None
+        self.type = None
+        self.display_name = display_name
+        self.status = None
+        self.description_for_admins = description_for_admins
+        self.description_for_reviewers = description_for_reviewers
+        self.principal_id = None
+        self.principal_type = None
+        self.principal_name = None
+        self.user_principal_name = None
+        self.mail_notifications_enabled = mail_notifications_enabled
+        self.reminder_notifications_enabled = reminder_notifications_enabled
+        self.default_decision_enabled = default_decision_enabled
+        self.justification_required_on_approval = justification_required_on_approval
+        self.default_decision = default_decision
+        self.auto_apply_decisions_enabled = auto_apply_decisions_enabled
+        self.recommendations_enabled = recommendations_enabled
+        self.instance_duration_in_days = instance_duration_in_days
+        self.type1 = type1
+        self.interval = interval
+        self.type2 = type2
+        self.number_of_occurrences = number_of_occurrences
+        self.start_date = start_date
+        self.end_date = end_date
+        self.resource_id = None
+        self.role_definition_id = None
+        self.principal_type1 = None
+        self.reviewers = reviewers
+        self.reviewers_type = None
+        self.instances = instances
+
+
+class AccessReviewScheduleDefinitionProperties(Model):
+    """Access Review.
+
+    Variables are only populated by the server, and will be ignored when
+    sending a request.
+
+    :param display_name: The display name for the schedule definition.
+    :type display_name: str
+    :ivar status: This read-only field specifies the status of an
+     accessReview. Possible values include: 'NotStarted', 'InProgress',
+     'Completed', 'Applied', 'Initializing', 'Applying', 'Completing',
+     'Scheduled', 'AutoReviewing', 'AutoReviewed', 'Starting'
+    :vartype status: str or
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewScheduleDefinitionStatus
+    :param description_for_admins: The description provided by the access
+     review creator and visible to admins.
+    :type description_for_admins: str
+    :param description_for_reviewers: The description provided by the access
+     review creator to be shown to reviewers.
+    :type description_for_reviewers: str
+    :ivar principal_id: The identity id
+    :vartype principal_id: str
+    :ivar principal_type: The identity type : user/servicePrincipal. Possible
+     values include: 'user', 'servicePrincipal'
+    :vartype principal_type: str or
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewActorIdentityType
+    :ivar principal_name: The identity display name
+    :vartype principal_name: str
+    :ivar user_principal_name: The user principal name(if valid)
+    :vartype user_principal_name: str
+    :param mail_notifications_enabled: Flag to indicate whether sending mails
+     to reviewers and the review creator is enabled.
+    :type mail_notifications_enabled: bool
+    :param reminder_notifications_enabled: Flag to indicate whether sending
+     reminder emails to reviewers are enabled.
+    :type reminder_notifications_enabled: bool
+    :param default_decision_enabled: Flag to indicate whether reviewers are
+     required to provide a justification when reviewing access.
+    :type default_decision_enabled: bool
+    :param justification_required_on_approval: Flag to indicate whether the
+     reviewer is required to pass justification when recording a decision.
+    :type justification_required_on_approval: bool
+    :param default_decision: This specifies the behavior for the autoReview
+     feature when an access review completes. Possible values include:
+     'Approve', 'Deny', 'Recommendation'
+    :type default_decision: str or
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.DefaultDecisionType
+    :param auto_apply_decisions_enabled: Flag to indicate whether auto-apply
+     capability, to automatically change the target object access resource, is
+     enabled. If not enabled, a user must, after the review completes, apply
+     the access review.
+    :type auto_apply_decisions_enabled: bool
+    :param recommendations_enabled: Flag to indicate whether showing
+     recommendations to reviewers is enabled.
+    :type recommendations_enabled: bool
+    :param instance_duration_in_days: The duration in days for an instance.
+    :type instance_duration_in_days: int
+    :param type: The recurrence type : weekly, monthly, etc. Possible values
+     include: 'weekly', 'absoluteMonthly'
+    :type type: str or
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewRecurrencePatternType
+    :param interval: The interval for recurrence. For a quarterly review, the
+     interval is 3 for type : absoluteMonthly.
+    :type interval: int
+    :param type1: The recurrence range type. The possible values are: endDate,
+     noEnd, numbered. Possible values include: 'endDate', 'noEnd', 'numbered'
+    :type type1: str or
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewRecurrenceRangeType
+    :param number_of_occurrences: The number of times to repeat the access
+     review. Required and must be positive if type is numbered.
+    :type number_of_occurrences: int
+    :param start_date: The DateTime when the review is scheduled to be start.
+     This could be a date in the future. Required on create.
+    :type start_date: datetime
+    :param end_date: The DateTime when the review is scheduled to end.
+     Required if type is endDate
+    :type end_date: datetime
+    :ivar resource_id: ResourceId in which this review is getting created
+    :vartype resource_id: str
+    :ivar role_definition_id: This is used to indicate the role being reviewed
+    :vartype role_definition_id: str
+    :ivar principal_type1: The identity type user/servicePrincipal to review.
+     Possible values include: 'user', 'servicePrincipal'
+    :vartype principal_type1: str or
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewScopePrincipalType
+    :param reviewers: This is the collection of reviewers.
+    :type reviewers:
+     list[~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewReviewer]
+    :ivar reviewers_type: This field specifies the type of reviewers for a
+     review. Usually for a review, reviewers are explicitly assigned. However,
+     in some cases, the reviewers may not be assigned and instead be chosen
+     dynamically. For example managers review or self review. Possible values
+     include: 'Assigned', 'Self', 'Managers'
+    :vartype reviewers_type: str or
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewScheduleDefinitionReviewersType
+    :param instances: This is the collection of instances returned when one
+     does an expand on it.
+    :type instances:
+     list[~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewInstance]
+    """
+
+    _validation = {
+        'status': {'readonly': True},
+        'principal_id': {'readonly': True},
+        'principal_type': {'readonly': True},
+        'principal_name': {'readonly': True},
+        'user_principal_name': {'readonly': True},
+        'resource_id': {'readonly': True},
+        'role_definition_id': {'readonly': True},
+        'principal_type1': {'readonly': True},
+        'reviewers_type': {'readonly': True},
+    }
+
+    _attribute_map = {
+        'display_name': {'key': 'displayName', 'type': 'str'},
+        'status': {'key': 'status', 'type': 'str'},
+        'description_for_admins': {'key': 'descriptionForAdmins', 'type': 'str'},
+        'description_for_reviewers': {'key': 'descriptionForReviewers', 'type': 'str'},
+        'principal_id': {'key': 'createdBy.principalId', 'type': 'str'},
+        'principal_type': {'key': 'createdBy.principalType', 'type': 'str'},
+        'principal_name': {'key': 'createdBy.principalName', 'type': 'str'},
+        'user_principal_name': {'key': 'createdBy.userPrincipalName', 'type': 'str'},
+        'mail_notifications_enabled': {'key': 'settings.mailNotificationsEnabled', 'type': 'bool'},
+        'reminder_notifications_enabled': {'key': 'settings.reminderNotificationsEnabled', 'type': 'bool'},
+        'default_decision_enabled': {'key': 'settings.defaultDecisionEnabled', 'type': 'bool'},
+        'justification_required_on_approval': {'key': 'settings.justificationRequiredOnApproval', 'type': 'bool'},
+        'default_decision': {'key': 'settings.defaultDecision', 'type': 'str'},
+        'auto_apply_decisions_enabled': {'key': 'settings.autoApplyDecisionsEnabled', 'type': 'bool'},
+        'recommendations_enabled': {'key': 'settings.recommendationsEnabled', 'type': 'bool'},
+        'instance_duration_in_days': {'key': 'settings.instanceDurationInDays', 'type': 'int'},
+        'type': {'key': 'settings.recurrence.pattern.type', 'type': 'str'},
+        'interval': {'key': 'settings.recurrence.pattern.interval', 'type': 'int'},
+        'type1': {'key': 'settings.recurrence.range.type', 'type': 'str'},
+        'number_of_occurrences': {'key': 'settings.recurrence.range.numberOfOccurrences', 'type': 'int'},
+        'start_date': {'key': 'settings.recurrence.range.startDate', 'type': 'iso-8601'},
+        'end_date': {'key': 'settings.recurrence.range.endDate', 'type': 'iso-8601'},
+        'resource_id': {'key': 'scope.resourceId', 'type': 'str'},
+        'role_definition_id': {'key': 'scope.roleDefinitionId', 'type': 'str'},
+        'principal_type1': {'key': 'scope.principalType', 'type': 'str'},
+        'reviewers': {'key': 'reviewers', 'type': '[AccessReviewReviewer]'},
+        'reviewers_type': {'key': 'reviewersType', 'type': 'str'},
+        'instances': {'key': 'instances', 'type': '[AccessReviewInstance]'},
+    }
+
+    def __init__(self, *, display_name: str=None, description_for_admins: str=None, description_for_reviewers: str=None, mail_notifications_enabled: bool=None, reminder_notifications_enabled: bool=None, default_decision_enabled: bool=None, justification_required_on_approval: bool=None, default_decision=None, auto_apply_decisions_enabled: bool=None, recommendations_enabled: bool=None, instance_duration_in_days: int=None, type=None, interval: int=None, type1=None, number_of_occurrences: int=None, start_date=None, end_date=None, reviewers=None, instances=None, **kwargs) -> None:
+        super(AccessReviewScheduleDefinitionProperties, self).__init__(**kwargs)
+        self.display_name = display_name
+        self.status = None
+        self.description_for_admins = description_for_admins
+        self.description_for_reviewers = description_for_reviewers
+        self.principal_id = None
+        self.principal_type = None
+        self.principal_name = None
+        self.user_principal_name = None
+        self.mail_notifications_enabled = mail_notifications_enabled
+        self.reminder_notifications_enabled = reminder_notifications_enabled
+        self.default_decision_enabled = default_decision_enabled
+        self.justification_required_on_approval = justification_required_on_approval
+        self.default_decision = default_decision
+        self.auto_apply_decisions_enabled = auto_apply_decisions_enabled
+        self.recommendations_enabled = recommendations_enabled
+        self.instance_duration_in_days = instance_duration_in_days
+        self.type = type
+        self.interval = interval
+        self.type1 = type1
+        self.number_of_occurrences = number_of_occurrences
+        self.start_date = start_date
+        self.end_date = end_date
+        self.resource_id = None
+        self.role_definition_id = None
+        self.principal_type1 = None
+        self.reviewers = reviewers
+        self.reviewers_type = None
+        self.instances = instances
+
+
+class AccessReviewScheduleSettings(Model):
+    """Settings of an Access Review.
+
+    :param mail_notifications_enabled: Flag to indicate whether sending mails
+     to reviewers and the review creator is enabled.
+    :type mail_notifications_enabled: bool
+    :param reminder_notifications_enabled: Flag to indicate whether sending
+     reminder emails to reviewers are enabled.
+    :type reminder_notifications_enabled: bool
+    :param default_decision_enabled: Flag to indicate whether reviewers are
+     required to provide a justification when reviewing access.
+    :type default_decision_enabled: bool
+    :param justification_required_on_approval: Flag to indicate whether the
+     reviewer is required to pass justification when recording a decision.
+    :type justification_required_on_approval: bool
+    :param default_decision: This specifies the behavior for the autoReview
+     feature when an access review completes. Possible values include:
+     'Approve', 'Deny', 'Recommendation'
+    :type default_decision: str or
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.DefaultDecisionType
+    :param auto_apply_decisions_enabled: Flag to indicate whether auto-apply
+     capability, to automatically change the target object access resource, is
+     enabled. If not enabled, a user must, after the review completes, apply
+     the access review.
+    :type auto_apply_decisions_enabled: bool
+    :param recommendations_enabled: Flag to indicate whether showing
+     recommendations to reviewers is enabled.
+    :type recommendations_enabled: bool
+    :param instance_duration_in_days: The duration in days for an instance.
+    :type instance_duration_in_days: int
+    :param recurrence: Access Review Settings.
+    :type recurrence:
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewRecurrenceSettings
+    """
+
+    _attribute_map = {
+        'mail_notifications_enabled': {'key': 'mailNotificationsEnabled', 'type': 'bool'},
+        'reminder_notifications_enabled': {'key': 'reminderNotificationsEnabled', 'type': 'bool'},
+        'default_decision_enabled': {'key': 'defaultDecisionEnabled', 'type': 'bool'},
+        'justification_required_on_approval': {'key': 'justificationRequiredOnApproval', 'type': 'bool'},
+        'default_decision': {'key': 'defaultDecision', 'type': 'str'},
+        'auto_apply_decisions_enabled': {'key': 'autoApplyDecisionsEnabled', 'type': 'bool'},
+        'recommendations_enabled': {'key': 'recommendationsEnabled', 'type': 'bool'},
+        'instance_duration_in_days': {'key': 'instanceDurationInDays', 'type': 'int'},
+        'recurrence': {'key': 'recurrence', 'type': 'AccessReviewRecurrenceSettings'},
+    }
+
+    def __init__(self, *, mail_notifications_enabled: bool=None, reminder_notifications_enabled: bool=None, default_decision_enabled: bool=None, justification_required_on_approval: bool=None, default_decision=None, auto_apply_decisions_enabled: bool=None, recommendations_enabled: bool=None, instance_duration_in_days: int=None, recurrence=None, **kwargs) -> None:
+        super(AccessReviewScheduleSettings, self).__init__(**kwargs)
+        self.mail_notifications_enabled = mail_notifications_enabled
+        self.reminder_notifications_enabled = reminder_notifications_enabled
+        self.default_decision_enabled = default_decision_enabled
+        self.justification_required_on_approval = justification_required_on_approval
+        self.default_decision = default_decision
+        self.auto_apply_decisions_enabled = auto_apply_decisions_enabled
+        self.recommendations_enabled = recommendations_enabled
+        self.instance_duration_in_days = instance_duration_in_days
+        self.recurrence = recurrence
+
+
+class CloudError(Model):
+    """CloudError.
+    """
+
+    _attribute_map = {
+    }
+
+
+class ErrorDefinition(Model):
+    """Error.
+
+    Error description and code explaining why an operation failed.
+
+    :param error: Error of the list gateway status.
+    :type error:
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.ErrorDefinitionProperties
+    """
+
+    _attribute_map = {
+        'error': {'key': 'error', 'type': 'ErrorDefinitionProperties'},
+    }
+
+    def __init__(self, *, error=None, **kwargs) -> None:
+        super(ErrorDefinition, self).__init__(**kwargs)
+        self.error = error
+
+
+class ErrorDefinitionException(HttpOperationError):
+    """Server responsed with exception of type: 'ErrorDefinition'.
+
+    :param deserialize: A deserializer
+    :param response: Server response to be deserialized.
+    """
+
+    def __init__(self, deserialize, response, *args):
+
+        super(ErrorDefinitionException, self).__init__(deserialize, response, 'ErrorDefinition', *args)
+
+
+class ErrorDefinitionProperties(Model):
+    """Error.
+
+    Error description and code explaining why an operation failed.
+
+    Variables are only populated by the server, and will be ignored when
+    sending a request.
+
+    :ivar message: Description of the error.
+    :vartype message: str
+    :param code: Error code of list gateway.
+    :type code: str
+    """
+
+    _validation = {
+        'message': {'readonly': True},
+    }
+
+    _attribute_map = {
+        'message': {'key': 'message', 'type': 'str'},
+        'code': {'key': 'code', 'type': 'str'},
+    }
+
+    def __init__(self, *, code: str=None, **kwargs) -> None:
+        super(ErrorDefinitionProperties, self).__init__(**kwargs)
+        self.message = None
+        self.code = code
+
+
+class Operation(Model):
+    """The definition of a Microsoft.Authorization operation.
+
+    :param name: Name of the operation
+    :type name: str
+    :param is_data_action: Indicates whether the operation is a data action
+    :type is_data_action: bool
+    :param display: Display of the operation
+    :type display:
+     ~azure.mgmt.authorization.v2018_05_01_preview.models.OperationDisplay
+    :param origin: Origin of the operation
+    :type origin: str
+    """
+
+    _attribute_map = {
+        'name': {'key': 'name', 'type': 'str'},
+        'is_data_action': {'key': 'isDataAction', 'type': 'bool'},
+        'display': {'key': 'display', 'type': 'OperationDisplay'},
+        'origin': {'key': 'origin', 'type': 'str'},
+    }
+
+    def __init__(self, *, name: str=None, is_data_action: bool=None, display=None, origin: str=None, **kwargs) -> None:
+        super(Operation, self).__init__(**kwargs)
+        self.name = name
+        self.is_data_action = is_data_action
+        self.display = display
+        self.origin = origin
+
+
+class OperationDisplay(Model):
+    """The display information for a Microsoft.Authorization operation.
+
+    Variables are only populated by the server, and will be ignored when
+    sending a request.
+
+    :ivar provider: The resource provider name: Microsoft.Authorization.
+    :vartype provider: str
+    :ivar resource: The resource on which the operation is performed.
+    :vartype resource: str
+    :ivar operation: The operation that users can perform.
+    :vartype operation: str
+    :ivar description: The description for the operation.
+    :vartype description: str
+    """
+
+    _validation = {
+        'provider': {'readonly': True},
+        'resource': {'readonly': True},
+        'operation': {'readonly': True},
+        'description': {'readonly': True},
+    }
+
+    _attribute_map = {
+        'provider': {'key': 'provider', 'type': 'str'},
+        'resource': {'key': 'resource', 'type': 'str'},
+        'operation': {'key': 'operation', 'type': 'str'},
+        'description': {'key': 'description', 'type': 'str'},
+    }
+
+    def __init__(self, **kwargs) -> None:
+        super(OperationDisplay, self).__init__(**kwargs)
+        self.provider = None
+        self.resource = None
+        self.operation = None
+        self.description = None
+
+
+class ServicePrincipalDecisionTarget(AccessReviewDecisionTarget):
+    """Service Principal Decision Target.
+
+    Variables are only populated by the server, and will be ignored when
+    sending a request.
+
+    All required parameters must be populated in order to send to Azure.
+
+    :param type: Required. Constant filled by server.
+    :type type: str
+    :ivar principal_id: The id of service principal whose access is reviewed.
+    :vartype principal_id: str
+    :ivar principal_name: The display name of the service principal whose
+     access was reviewed.
+    :vartype principal_name: str
+    :ivar app_id: The appId for the service principal entity being reviewed
+    :vartype app_id: str
+    """
+
+    _validation = {
+        'type': {'required': True},
+        'principal_id': {'readonly': True},
+        'principal_name': {'readonly': True},
+        'app_id': {'readonly': True},
+    }
+
+    _attribute_map = {
+        'type': {'key': 'type', 'type': 'str'},
+        'principal_id': {'key': 'principalId', 'type': 'str'},
+        'principal_name': {'key': 'principalName', 'type': 'str'},
+        'app_id': {'key': 'appId', 'type': 'str'},
+    }
+
+    def __init__(self, **kwargs) -> None:
+        super(ServicePrincipalDecisionTarget, self).__init__(**kwargs)
+        self.principal_id = None
+        self.principal_name = None
+        self.app_id = None
+        self.type = 'servicePrincipal'
+
+
+class UserDecisionTarget(AccessReviewDecisionTarget):
+    """User Decision Target.
+
+    Variables are only populated by the server, and will be ignored when
+    sending a request.
+
+    All required parameters must be populated in order to send to Azure.
+
+    :param type: Required. Constant filled by server.
+    :type type: str
+    :ivar principal_id: The id of user whose access was reviewed.
+    :vartype principal_id: str
+    :ivar principal_name: The display name of the user whose access was
+     reviewed.
+    :vartype principal_name: str
+    :ivar user_principal_name: The user principal name of the user whose
+     access was reviewed.
+    :vartype user_principal_name: str
+    """
+
+    _validation = {
+        'type': {'required': True},
+        'principal_id': {'readonly': True},
+        'principal_name': {'readonly': True},
+        'user_principal_name': {'readonly': True},
+    }
+
+    _attribute_map = {
+        'type': {'key': 'type', 'type': 'str'},
+        'principal_id': {'key': 'principalId', 'type': 'str'},
+        'principal_name': {'key': 'principalName', 'type': 'str'},
+        'user_principal_name': {'key': 'userPrincipalName', 'type': 'str'},
+    }
+
+    def __init__(self, **kwargs) -> None:
+        super(UserDecisionTarget, self).__init__(**kwargs)
+        self.principal_id = None
+        self.principal_name = None
+        self.user_principal_name = None
+        self.type = 'user'
diff --git a/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2018_05_01_preview/models/_paged_models.py b/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2018_05_01_preview/models/_paged_models.py
new file mode 100644
index 0000000000000..3def9e2f03678
--- /dev/null
+++ b/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2018_05_01_preview/models/_paged_models.py
@@ -0,0 +1,66 @@
+# coding=utf-8
+# --------------------------------------------------------------------------
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License. See License.txt in the project root for
+# license information.
+#
+# Code generated by Microsoft (R) AutoRest Code Generator.
+# Changes may cause incorrect behavior and will be lost if the code is
+# regenerated.
+# --------------------------------------------------------------------------
+
+from msrest.paging import Paged
+
+
+class OperationPaged(Paged):
+    """
+    A paging container for iterating over a list of :class:`Operation <azure.mgmt.authorization.v2018_05_01_preview.models.Operation>` object
+    """
+
+    _attribute_map = {
+        'next_link': {'key': 'nextLink', 'type': 'str'},
+        'current_page': {'key': 'value', 'type': '[Operation]'}
+    }
+
+    def __init__(self, *args, **kwargs):
+
+        super(OperationPaged, self).__init__(*args, **kwargs)
+class AccessReviewScheduleDefinitionPaged(Paged):
+    """
+    A paging container for iterating over a list of :class:`AccessReviewScheduleDefinition <azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewScheduleDefinition>` object
+    """
+
+    _attribute_map = {
+        'next_link': {'key': 'nextLink', 'type': 'str'},
+        'current_page': {'key': 'value', 'type': '[AccessReviewScheduleDefinition]'}
+    }
+
+    def __init__(self, *args, **kwargs):
+
+        super(AccessReviewScheduleDefinitionPaged, self).__init__(*args, **kwargs)
+class AccessReviewInstancePaged(Paged):
+    """
+    A paging container for iterating over a list of :class:`AccessReviewInstance <azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewInstance>` object
+    """
+
+    _attribute_map = {
+        'next_link': {'key': 'nextLink', 'type': 'str'},
+        'current_page': {'key': 'value', 'type': '[AccessReviewInstance]'}
+    }
+
+    def __init__(self, *args, **kwargs):
+
+        super(AccessReviewInstancePaged, self).__init__(*args, **kwargs)
+class AccessReviewDecisionPaged(Paged):
+    """
+    A paging container for iterating over a list of :class:`AccessReviewDecision <azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewDecision>` object
+    """
+
+    _attribute_map = {
+        'next_link': {'key': 'nextLink', 'type': 'str'},
+        'current_page': {'key': 'value', 'type': '[AccessReviewDecision]'}
+    }
+
+    def __init__(self, *args, **kwargs):
+
+        super(AccessReviewDecisionPaged, self).__init__(*args, **kwargs)
diff --git a/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2018_05_01_preview/operations/__init__.py b/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2018_05_01_preview/operations/__init__.py
new file mode 100644
index 0000000000000..cba7f42add555
--- /dev/null
+++ b/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2018_05_01_preview/operations/__init__.py
@@ -0,0 +1,32 @@
+# coding=utf-8
+# --------------------------------------------------------------------------
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License. See License.txt in the project root for
+# license information.
+#
+# Code generated by Microsoft (R) AutoRest Code Generator.
+# Changes may cause incorrect behavior and will be lost if the code is
+# regenerated.
+# --------------------------------------------------------------------------
+
+from ._operations import Operations
+from ._access_review_schedule_definitions_operations import AccessReviewScheduleDefinitionsOperations
+from ._access_review_instances_operations import AccessReviewInstancesOperations
+from ._access_review_instance_operations import AccessReviewInstanceOperations
+from ._access_review_instance_decisions_operations import AccessReviewInstanceDecisionsOperations
+from ._access_review_default_settings_operations import AccessReviewDefaultSettingsOperations
+from ._access_review_schedule_definitions_assigned_for_my_approval_operations import AccessReviewScheduleDefinitionsAssignedForMyApprovalOperations
+from ._access_review_instances_assigned_for_my_approval_operations import AccessReviewInstancesAssignedForMyApprovalOperations
+from ._access_review_instance_my_decisions_operations import AccessReviewInstanceMyDecisionsOperations
+
+__all__ = [
+    'Operations',
+    'AccessReviewScheduleDefinitionsOperations',
+    'AccessReviewInstancesOperations',
+    'AccessReviewInstanceOperations',
+    'AccessReviewInstanceDecisionsOperations',
+    'AccessReviewDefaultSettingsOperations',
+    'AccessReviewScheduleDefinitionsAssignedForMyApprovalOperations',
+    'AccessReviewInstancesAssignedForMyApprovalOperations',
+    'AccessReviewInstanceMyDecisionsOperations',
+]
diff --git a/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2018_05_01_preview/operations/_access_review_default_settings_operations.py b/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2018_05_01_preview/operations/_access_review_default_settings_operations.py
new file mode 100644
index 0000000000000..c86d01586b5ce
--- /dev/null
+++ b/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2018_05_01_preview/operations/_access_review_default_settings_operations.py
@@ -0,0 +1,156 @@
+# coding=utf-8
+# --------------------------------------------------------------------------
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License. See License.txt in the project root for
+# license information.
+#
+# Code generated by Microsoft (R) AutoRest Code Generator.
+# Changes may cause incorrect behavior and will be lost if the code is
+# regenerated.
+# --------------------------------------------------------------------------
+
+import uuid
+from msrest.pipeline import ClientRawResponse
+
+from .. import models
+
+
+class AccessReviewDefaultSettingsOperations(object):
+    """AccessReviewDefaultSettingsOperations operations.
+
+    You should not instantiate directly this class, but create a Client instance that will create it for you and attach it as attribute.
+
+    :param client: Client for service requests.
+    :param config: Configuration of service client.
+    :param serializer: An object model serializer.
+    :param deserializer: An object model deserializer.
+    :ivar api_version: The API version to be used with the HTTP request. Constant value: "2018-05-01-preview".
+    """
+
+    models = models
+
+    def __init__(self, client, config, serializer, deserializer):
+
+        self._client = client
+        self._serialize = serializer
+        self._deserialize = deserializer
+        self.api_version = "2018-05-01-preview"
+
+        self.config = config
+
+    def get(
+            self, custom_headers=None, raw=False, **operation_config):
+        """Get access review default settings for the subscription.
+
+        :param dict custom_headers: headers that will be added to the request
+        :param bool raw: returns the direct response alongside the
+         deserialized response
+        :param operation_config: :ref:`Operation configuration
+         overrides<msrest:optionsforoperations>`.
+        :return: AccessReviewDefaultSettings or ClientRawResponse if raw=true
+        :rtype:
+         ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewDefaultSettings
+         or ~msrest.pipeline.ClientRawResponse
+        :raises:
+         :class:`ErrorDefinitionException<azure.mgmt.authorization.v2018_05_01_preview.models.ErrorDefinitionException>`
+        """
+        # Construct URL
+        url = self.get.metadata['url']
+        path_format_arguments = {
+            'subscriptionId': self._serialize.url("self.config.subscription_id", self.config.subscription_id, 'str')
+        }
+        url = self._client.format_url(url, **path_format_arguments)
+
+        # Construct parameters
+        query_parameters = {}
+        query_parameters['api-version'] = self._serialize.query("self.api_version", self.api_version, 'str')
+
+        # Construct headers
+        header_parameters = {}
+        header_parameters['Accept'] = 'application/json'
+        if self.config.generate_client_request_id:
+            header_parameters['x-ms-client-request-id'] = str(uuid.uuid1())
+        if custom_headers:
+            header_parameters.update(custom_headers)
+        if self.config.accept_language is not None:
+            header_parameters['accept-language'] = self._serialize.header("self.config.accept_language", self.config.accept_language, 'str')
+
+        # Construct and send request
+        request = self._client.get(url, query_parameters, header_parameters)
+        response = self._client.send(request, stream=False, **operation_config)
+
+        if response.status_code not in [200]:
+            raise models.ErrorDefinitionException(self._deserialize, response)
+
+        deserialized = None
+        if response.status_code == 200:
+            deserialized = self._deserialize('AccessReviewDefaultSettings', response)
+
+        if raw:
+            client_raw_response = ClientRawResponse(deserialized, response)
+            return client_raw_response
+
+        return deserialized
+    get.metadata = {'url': '/subscriptions/{subscriptionId}/providers/Microsoft.Authorization/accessReviewScheduleSettings/default'}
+
+    def put(
+            self, properties, custom_headers=None, raw=False, **operation_config):
+        """Get access review default settings for the subscription.
+
+        :param properties: Access review schedule settings.
+        :type properties:
+         ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewScheduleSettings
+        :param dict custom_headers: headers that will be added to the request
+        :param bool raw: returns the direct response alongside the
+         deserialized response
+        :param operation_config: :ref:`Operation configuration
+         overrides<msrest:optionsforoperations>`.
+        :return: AccessReviewDefaultSettings or ClientRawResponse if raw=true
+        :rtype:
+         ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewDefaultSettings
+         or ~msrest.pipeline.ClientRawResponse
+        :raises:
+         :class:`ErrorDefinitionException<azure.mgmt.authorization.v2018_05_01_preview.models.ErrorDefinitionException>`
+        """
+        # Construct URL
+        url = self.put.metadata['url']
+        path_format_arguments = {
+            'subscriptionId': self._serialize.url("self.config.subscription_id", self.config.subscription_id, 'str')
+        }
+        url = self._client.format_url(url, **path_format_arguments)
+
+        # Construct parameters
+        query_parameters = {}
+        query_parameters['api-version'] = self._serialize.query("self.api_version", self.api_version, 'str')
+
+        # Construct headers
+        header_parameters = {}
+        header_parameters['Accept'] = 'application/json'
+        header_parameters['Content-Type'] = 'application/json; charset=utf-8'
+        if self.config.generate_client_request_id:
+            header_parameters['x-ms-client-request-id'] = str(uuid.uuid1())
+        if custom_headers:
+            header_parameters.update(custom_headers)
+        if self.config.accept_language is not None:
+            header_parameters['accept-language'] = self._serialize.header("self.config.accept_language", self.config.accept_language, 'str')
+
+        # Construct body
+        body_content = self._serialize.body(properties, 'AccessReviewScheduleSettings')
+
+        # Construct and send request
+        request = self._client.put(url, query_parameters, header_parameters, body_content)
+        response = self._client.send(request, stream=False, **operation_config)
+
+        if response.status_code not in [200]:
+            raise models.ErrorDefinitionException(self._deserialize, response)
+
+        deserialized = None
+        if response.status_code == 200:
+            deserialized = self._deserialize('AccessReviewDefaultSettings', response)
+
+        if raw:
+            client_raw_response = ClientRawResponse(deserialized, response)
+            return client_raw_response
+
+        return deserialized
+    put.metadata = {'url': '/subscriptions/{subscriptionId}/providers/Microsoft.Authorization/accessReviewScheduleSettings/default'}
diff --git a/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2018_05_01_preview/operations/_access_review_instance_decisions_operations.py b/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2018_05_01_preview/operations/_access_review_instance_decisions_operations.py
new file mode 100644
index 0000000000000..f851a3bba40d1
--- /dev/null
+++ b/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2018_05_01_preview/operations/_access_review_instance_decisions_operations.py
@@ -0,0 +1,111 @@
+# coding=utf-8
+# --------------------------------------------------------------------------
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License. See License.txt in the project root for
+# license information.
+#
+# Code generated by Microsoft (R) AutoRest Code Generator.
+# Changes may cause incorrect behavior and will be lost if the code is
+# regenerated.
+# --------------------------------------------------------------------------
+
+import uuid
+from msrest.pipeline import ClientRawResponse
+
+from .. import models
+
+
+class AccessReviewInstanceDecisionsOperations(object):
+    """AccessReviewInstanceDecisionsOperations operations.
+
+    You should not instantiate directly this class, but create a Client instance that will create it for you and attach it as attribute.
+
+    :param client: Client for service requests.
+    :param config: Configuration of service client.
+    :param serializer: An object model serializer.
+    :param deserializer: An object model deserializer.
+    :ivar api_version: The API version to be used with the HTTP request. Constant value: "2018-05-01-preview".
+    """
+
+    models = models
+
+    def __init__(self, client, config, serializer, deserializer):
+
+        self._client = client
+        self._serialize = serializer
+        self._deserialize = deserializer
+        self.api_version = "2018-05-01-preview"
+
+        self.config = config
+
+    def list(
+            self, schedule_definition_id, id, custom_headers=None, raw=False, **operation_config):
+        """Get access review instance decisions.
+
+        :param schedule_definition_id: The id of the access review schedule
+         definition.
+        :type schedule_definition_id: str
+        :param id: The id of the access review instance.
+        :type id: str
+        :param dict custom_headers: headers that will be added to the request
+        :param bool raw: returns the direct response alongside the
+         deserialized response
+        :param operation_config: :ref:`Operation configuration
+         overrides<msrest:optionsforoperations>`.
+        :return: An iterator like instance of AccessReviewDecision
+        :rtype:
+         ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewDecisionPaged[~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewDecision]
+        :raises:
+         :class:`ErrorDefinitionException<azure.mgmt.authorization.v2018_05_01_preview.models.ErrorDefinitionException>`
+        """
+        def prepare_request(next_link=None):
+            if not next_link:
+                # Construct URL
+                url = self.list.metadata['url']
+                path_format_arguments = {
+                    'scheduleDefinitionId': self._serialize.url("schedule_definition_id", schedule_definition_id, 'str'),
+                    'id': self._serialize.url("id", id, 'str'),
+                    'subscriptionId': self._serialize.url("self.config.subscription_id", self.config.subscription_id, 'str')
+                }
+                url = self._client.format_url(url, **path_format_arguments)
+
+                # Construct parameters
+                query_parameters = {}
+                query_parameters['api-version'] = self._serialize.query("self.api_version", self.api_version, 'str')
+
+            else:
+                url = next_link
+                query_parameters = {}
+
+            # Construct headers
+            header_parameters = {}
+            header_parameters['Accept'] = 'application/json'
+            if self.config.generate_client_request_id:
+                header_parameters['x-ms-client-request-id'] = str(uuid.uuid1())
+            if custom_headers:
+                header_parameters.update(custom_headers)
+            if self.config.accept_language is not None:
+                header_parameters['accept-language'] = self._serialize.header("self.config.accept_language", self.config.accept_language, 'str')
+
+            # Construct and send request
+            request = self._client.get(url, query_parameters, header_parameters)
+            return request
+
+        def internal_paging(next_link=None):
+            request = prepare_request(next_link)
+
+            response = self._client.send(request, stream=False, **operation_config)
+
+            if response.status_code not in [200]:
+                raise models.ErrorDefinitionException(self._deserialize, response)
+
+            return response
+
+        # Deserialize response
+        header_dict = None
+        if raw:
+            header_dict = {}
+        deserialized = models.AccessReviewDecisionPaged(internal_paging, self._deserialize.dependencies, header_dict)
+
+        return deserialized
+    list.metadata = {'url': '/subscriptions/{subscriptionId}/providers/Microsoft.Authorization/accessReviewScheduleDefinitions/{scheduleDefinitionId}/instances/{id}/decisions'}
diff --git a/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2018_05_01_preview/operations/_access_review_instance_my_decisions_operations.py b/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2018_05_01_preview/operations/_access_review_instance_my_decisions_operations.py
new file mode 100644
index 0000000000000..8efbc740b4a46
--- /dev/null
+++ b/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2018_05_01_preview/operations/_access_review_instance_my_decisions_operations.py
@@ -0,0 +1,253 @@
+# coding=utf-8
+# --------------------------------------------------------------------------
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License. See License.txt in the project root for
+# license information.
+#
+# Code generated by Microsoft (R) AutoRest Code Generator.
+# Changes may cause incorrect behavior and will be lost if the code is
+# regenerated.
+# --------------------------------------------------------------------------
+
+import uuid
+from msrest.pipeline import ClientRawResponse
+
+from .. import models
+
+
+class AccessReviewInstanceMyDecisionsOperations(object):
+    """AccessReviewInstanceMyDecisionsOperations operations.
+
+    You should not instantiate directly this class, but create a Client instance that will create it for you and attach it as attribute.
+
+    :param client: Client for service requests.
+    :param config: Configuration of service client.
+    :param serializer: An object model serializer.
+    :param deserializer: An object model deserializer.
+    :ivar api_version: The API version to be used with the HTTP request. Constant value: "2018-05-01-preview".
+    """
+
+    models = models
+
+    def __init__(self, client, config, serializer, deserializer):
+
+        self._client = client
+        self._serialize = serializer
+        self._deserialize = deserializer
+        self.api_version = "2018-05-01-preview"
+
+        self.config = config
+
+    def list(
+            self, schedule_definition_id, id, custom_headers=None, raw=False, **operation_config):
+        """Get my access review instance decisions.
+
+        :param schedule_definition_id: The id of the access review schedule
+         definition.
+        :type schedule_definition_id: str
+        :param id: The id of the access review instance.
+        :type id: str
+        :param dict custom_headers: headers that will be added to the request
+        :param bool raw: returns the direct response alongside the
+         deserialized response
+        :param operation_config: :ref:`Operation configuration
+         overrides<msrest:optionsforoperations>`.
+        :return: An iterator like instance of AccessReviewDecision
+        :rtype:
+         ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewDecisionPaged[~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewDecision]
+        :raises:
+         :class:`ErrorDefinitionException<azure.mgmt.authorization.v2018_05_01_preview.models.ErrorDefinitionException>`
+        """
+        def prepare_request(next_link=None):
+            if not next_link:
+                # Construct URL
+                url = self.list.metadata['url']
+                path_format_arguments = {
+                    'scheduleDefinitionId': self._serialize.url("schedule_definition_id", schedule_definition_id, 'str'),
+                    'id': self._serialize.url("id", id, 'str')
+                }
+                url = self._client.format_url(url, **path_format_arguments)
+
+                # Construct parameters
+                query_parameters = {}
+                query_parameters['api-version'] = self._serialize.query("self.api_version", self.api_version, 'str')
+
+            else:
+                url = next_link
+                query_parameters = {}
+
+            # Construct headers
+            header_parameters = {}
+            header_parameters['Accept'] = 'application/json'
+            if self.config.generate_client_request_id:
+                header_parameters['x-ms-client-request-id'] = str(uuid.uuid1())
+            if custom_headers:
+                header_parameters.update(custom_headers)
+            if self.config.accept_language is not None:
+                header_parameters['accept-language'] = self._serialize.header("self.config.accept_language", self.config.accept_language, 'str')
+
+            # Construct and send request
+            request = self._client.get(url, query_parameters, header_parameters)
+            return request
+
+        def internal_paging(next_link=None):
+            request = prepare_request(next_link)
+
+            response = self._client.send(request, stream=False, **operation_config)
+
+            if response.status_code not in [200]:
+                raise models.ErrorDefinitionException(self._deserialize, response)
+
+            return response
+
+        # Deserialize response
+        header_dict = None
+        if raw:
+            header_dict = {}
+        deserialized = models.AccessReviewDecisionPaged(internal_paging, self._deserialize.dependencies, header_dict)
+
+        return deserialized
+    list.metadata = {'url': '/providers/Microsoft.Authorization/accessReviewScheduleDefinitions/{scheduleDefinitionId}/instances/{id}/decisions'}
+
+    def get_by_id(
+            self, schedule_definition_id, id, decision_id, custom_headers=None, raw=False, **operation_config):
+        """Get my single access review instance decision.
+
+        :param schedule_definition_id: The id of the access review schedule
+         definition.
+        :type schedule_definition_id: str
+        :param id: The id of the access review instance.
+        :type id: str
+        :param decision_id: The id of the decision record.
+        :type decision_id: str
+        :param dict custom_headers: headers that will be added to the request
+        :param bool raw: returns the direct response alongside the
+         deserialized response
+        :param operation_config: :ref:`Operation configuration
+         overrides<msrest:optionsforoperations>`.
+        :return: AccessReviewDecision or ClientRawResponse if raw=true
+        :rtype:
+         ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewDecision
+         or ~msrest.pipeline.ClientRawResponse
+        :raises:
+         :class:`ErrorDefinitionException<azure.mgmt.authorization.v2018_05_01_preview.models.ErrorDefinitionException>`
+        """
+        # Construct URL
+        url = self.get_by_id.metadata['url']
+        path_format_arguments = {
+            'scheduleDefinitionId': self._serialize.url("schedule_definition_id", schedule_definition_id, 'str'),
+            'id': self._serialize.url("id", id, 'str'),
+            'decisionId': self._serialize.url("decision_id", decision_id, 'str')
+        }
+        url = self._client.format_url(url, **path_format_arguments)
+
+        # Construct parameters
+        query_parameters = {}
+        query_parameters['api-version'] = self._serialize.query("self.api_version", self.api_version, 'str')
+
+        # Construct headers
+        header_parameters = {}
+        header_parameters['Accept'] = 'application/json'
+        if self.config.generate_client_request_id:
+            header_parameters['x-ms-client-request-id'] = str(uuid.uuid1())
+        if custom_headers:
+            header_parameters.update(custom_headers)
+        if self.config.accept_language is not None:
+            header_parameters['accept-language'] = self._serialize.header("self.config.accept_language", self.config.accept_language, 'str')
+
+        # Construct and send request
+        request = self._client.get(url, query_parameters, header_parameters)
+        response = self._client.send(request, stream=False, **operation_config)
+
+        if response.status_code not in [200]:
+            raise models.ErrorDefinitionException(self._deserialize, response)
+
+        deserialized = None
+        if response.status_code == 200:
+            deserialized = self._deserialize('AccessReviewDecision', response)
+
+        if raw:
+            client_raw_response = ClientRawResponse(deserialized, response)
+            return client_raw_response
+
+        return deserialized
+    get_by_id.metadata = {'url': '/providers/Microsoft.Authorization/accessReviewScheduleDefinitions/{scheduleDefinitionId}/instances/{id}/decisions/{decisionId}'}
+
+    def patch(
+            self, schedule_definition_id, id, decision_id, decision=None, justification=None, custom_headers=None, raw=False, **operation_config):
+        """Record a decision.
+
+        :param schedule_definition_id: The id of the access review schedule
+         definition.
+        :type schedule_definition_id: str
+        :param id: The id of the access review instance.
+        :type id: str
+        :param decision_id: The id of the decision record.
+        :type decision_id: str
+        :param decision: The decision on the approval step. This value is
+         initially set to NotReviewed. Approvers can take action of
+         Approve/Deny. Possible values include: 'Approve', 'Deny',
+         'NotReviewed', 'DontKnow', 'NotNotified'
+        :type decision: str or
+         ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewResult
+        :param justification: Justification provided by approvers for their
+         action
+        :type justification: str
+        :param dict custom_headers: headers that will be added to the request
+        :param bool raw: returns the direct response alongside the
+         deserialized response
+        :param operation_config: :ref:`Operation configuration
+         overrides<msrest:optionsforoperations>`.
+        :return: AccessReviewDecision or ClientRawResponse if raw=true
+        :rtype:
+         ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewDecision
+         or ~msrest.pipeline.ClientRawResponse
+        :raises:
+         :class:`ErrorDefinitionException<azure.mgmt.authorization.v2018_05_01_preview.models.ErrorDefinitionException>`
+        """
+        properties = models.AccessReviewDecisionProperties(decision=decision, justification=justification)
+
+        # Construct URL
+        url = self.patch.metadata['url']
+        path_format_arguments = {
+            'scheduleDefinitionId': self._serialize.url("schedule_definition_id", schedule_definition_id, 'str'),
+            'id': self._serialize.url("id", id, 'str'),
+            'decisionId': self._serialize.url("decision_id", decision_id, 'str')
+        }
+        url = self._client.format_url(url, **path_format_arguments)
+
+        # Construct parameters
+        query_parameters = {}
+        query_parameters['api-version'] = self._serialize.query("self.api_version", self.api_version, 'str')
+
+        # Construct headers
+        header_parameters = {}
+        header_parameters['Accept'] = 'application/json'
+        header_parameters['Content-Type'] = 'application/json; charset=utf-8'
+        if self.config.generate_client_request_id:
+            header_parameters['x-ms-client-request-id'] = str(uuid.uuid1())
+        if custom_headers:
+            header_parameters.update(custom_headers)
+        if self.config.accept_language is not None:
+            header_parameters['accept-language'] = self._serialize.header("self.config.accept_language", self.config.accept_language, 'str')
+
+        # Construct body
+        body_content = self._serialize.body(properties, 'AccessReviewDecisionProperties')
+
+        # Construct and send request
+        request = self._client.patch(url, query_parameters, header_parameters, body_content)
+        response = self._client.send(request, stream=False, **operation_config)
+
+        if response.status_code not in [200]:
+            raise models.ErrorDefinitionException(self._deserialize, response)
+
+        deserialized = None
+        if response.status_code == 200:
+            deserialized = self._deserialize('AccessReviewDecision', response)
+
+        if raw:
+            client_raw_response = ClientRawResponse(deserialized, response)
+            return client_raw_response
+
+        return deserialized
+    patch.metadata = {'url': '/providers/Microsoft.Authorization/accessReviewScheduleDefinitions/{scheduleDefinitionId}/instances/{id}/decisions/{decisionId}'}
diff --git a/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2018_05_01_preview/operations/_access_review_instance_operations.py b/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2018_05_01_preview/operations/_access_review_instance_operations.py
new file mode 100644
index 0000000000000..dbc28ccb44307
--- /dev/null
+++ b/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2018_05_01_preview/operations/_access_review_instance_operations.py
@@ -0,0 +1,304 @@
+# coding=utf-8
+# --------------------------------------------------------------------------
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License. See License.txt in the project root for
+# license information.
+#
+# Code generated by Microsoft (R) AutoRest Code Generator.
+# Changes may cause incorrect behavior and will be lost if the code is
+# regenerated.
+# --------------------------------------------------------------------------
+
+import uuid
+from msrest.pipeline import ClientRawResponse
+
+from .. import models
+
+
+class AccessReviewInstanceOperations(object):
+    """AccessReviewInstanceOperations operations.
+
+    You should not instantiate directly this class, but create a Client instance that will create it for you and attach it as attribute.
+
+    :param client: Client for service requests.
+    :param config: Configuration of service client.
+    :param serializer: An object model serializer.
+    :param deserializer: An object model deserializer.
+    :ivar api_version: The API version to be used with the HTTP request. Constant value: "2018-05-01-preview".
+    """
+
+    models = models
+
+    def __init__(self, client, config, serializer, deserializer):
+
+        self._client = client
+        self._serialize = serializer
+        self._deserialize = deserializer
+        self.api_version = "2018-05-01-preview"
+
+        self.config = config
+
+    def stop(
+            self, schedule_definition_id, id, custom_headers=None, raw=False, **operation_config):
+        """An action to stop an access review instance.
+
+        :param schedule_definition_id: The id of the access review schedule
+         definition.
+        :type schedule_definition_id: str
+        :param id: The id of the access review instance.
+        :type id: str
+        :param dict custom_headers: headers that will be added to the request
+        :param bool raw: returns the direct response alongside the
+         deserialized response
+        :param operation_config: :ref:`Operation configuration
+         overrides<msrest:optionsforoperations>`.
+        :return: None or ClientRawResponse if raw=true
+        :rtype: None or ~msrest.pipeline.ClientRawResponse
+        :raises:
+         :class:`ErrorDefinitionException<azure.mgmt.authorization.v2018_05_01_preview.models.ErrorDefinitionException>`
+        """
+        # Construct URL
+        url = self.stop.metadata['url']
+        path_format_arguments = {
+            'scheduleDefinitionId': self._serialize.url("schedule_definition_id", schedule_definition_id, 'str'),
+            'id': self._serialize.url("id", id, 'str'),
+            'subscriptionId': self._serialize.url("self.config.subscription_id", self.config.subscription_id, 'str')
+        }
+        url = self._client.format_url(url, **path_format_arguments)
+
+        # Construct parameters
+        query_parameters = {}
+        query_parameters['api-version'] = self._serialize.query("self.api_version", self.api_version, 'str')
+
+        # Construct headers
+        header_parameters = {}
+        if self.config.generate_client_request_id:
+            header_parameters['x-ms-client-request-id'] = str(uuid.uuid1())
+        if custom_headers:
+            header_parameters.update(custom_headers)
+        if self.config.accept_language is not None:
+            header_parameters['accept-language'] = self._serialize.header("self.config.accept_language", self.config.accept_language, 'str')
+
+        # Construct and send request
+        request = self._client.post(url, query_parameters, header_parameters)
+        response = self._client.send(request, stream=False, **operation_config)
+
+        if response.status_code not in [204]:
+            raise models.ErrorDefinitionException(self._deserialize, response)
+
+        if raw:
+            client_raw_response = ClientRawResponse(None, response)
+            return client_raw_response
+    stop.metadata = {'url': '/subscriptions/{subscriptionId}/providers/Microsoft.Authorization/accessReviewScheduleDefinitions/{scheduleDefinitionId}/instances/{id}/stop'}
+
+    def reset_decisions(
+            self, schedule_definition_id, id, custom_headers=None, raw=False, **operation_config):
+        """An action to reset all decisions for an access review instance.
+
+        :param schedule_definition_id: The id of the access review schedule
+         definition.
+        :type schedule_definition_id: str
+        :param id: The id of the access review instance.
+        :type id: str
+        :param dict custom_headers: headers that will be added to the request
+        :param bool raw: returns the direct response alongside the
+         deserialized response
+        :param operation_config: :ref:`Operation configuration
+         overrides<msrest:optionsforoperations>`.
+        :return: None or ClientRawResponse if raw=true
+        :rtype: None or ~msrest.pipeline.ClientRawResponse
+        :raises:
+         :class:`ErrorDefinitionException<azure.mgmt.authorization.v2018_05_01_preview.models.ErrorDefinitionException>`
+        """
+        # Construct URL
+        url = self.reset_decisions.metadata['url']
+        path_format_arguments = {
+            'scheduleDefinitionId': self._serialize.url("schedule_definition_id", schedule_definition_id, 'str'),
+            'id': self._serialize.url("id", id, 'str'),
+            'subscriptionId': self._serialize.url("self.config.subscription_id", self.config.subscription_id, 'str')
+        }
+        url = self._client.format_url(url, **path_format_arguments)
+
+        # Construct parameters
+        query_parameters = {}
+        query_parameters['api-version'] = self._serialize.query("self.api_version", self.api_version, 'str')
+
+        # Construct headers
+        header_parameters = {}
+        if self.config.generate_client_request_id:
+            header_parameters['x-ms-client-request-id'] = str(uuid.uuid1())
+        if custom_headers:
+            header_parameters.update(custom_headers)
+        if self.config.accept_language is not None:
+            header_parameters['accept-language'] = self._serialize.header("self.config.accept_language", self.config.accept_language, 'str')
+
+        # Construct and send request
+        request = self._client.post(url, query_parameters, header_parameters)
+        response = self._client.send(request, stream=False, **operation_config)
+
+        if response.status_code not in [204]:
+            raise models.ErrorDefinitionException(self._deserialize, response)
+
+        if raw:
+            client_raw_response = ClientRawResponse(None, response)
+            return client_raw_response
+    reset_decisions.metadata = {'url': '/subscriptions/{subscriptionId}/providers/Microsoft.Authorization/accessReviewScheduleDefinitions/{scheduleDefinitionId}/instances/{id}/resetDecisions'}
+
+    def apply_decisions(
+            self, schedule_definition_id, id, custom_headers=None, raw=False, **operation_config):
+        """An action to apply all decisions for an access review instance.
+
+        :param schedule_definition_id: The id of the access review schedule
+         definition.
+        :type schedule_definition_id: str
+        :param id: The id of the access review instance.
+        :type id: str
+        :param dict custom_headers: headers that will be added to the request
+        :param bool raw: returns the direct response alongside the
+         deserialized response
+        :param operation_config: :ref:`Operation configuration
+         overrides<msrest:optionsforoperations>`.
+        :return: None or ClientRawResponse if raw=true
+        :rtype: None or ~msrest.pipeline.ClientRawResponse
+        :raises:
+         :class:`ErrorDefinitionException<azure.mgmt.authorization.v2018_05_01_preview.models.ErrorDefinitionException>`
+        """
+        # Construct URL
+        url = self.apply_decisions.metadata['url']
+        path_format_arguments = {
+            'scheduleDefinitionId': self._serialize.url("schedule_definition_id", schedule_definition_id, 'str'),
+            'id': self._serialize.url("id", id, 'str'),
+            'subscriptionId': self._serialize.url("self.config.subscription_id", self.config.subscription_id, 'str')
+        }
+        url = self._client.format_url(url, **path_format_arguments)
+
+        # Construct parameters
+        query_parameters = {}
+        query_parameters['api-version'] = self._serialize.query("self.api_version", self.api_version, 'str')
+
+        # Construct headers
+        header_parameters = {}
+        if self.config.generate_client_request_id:
+            header_parameters['x-ms-client-request-id'] = str(uuid.uuid1())
+        if custom_headers:
+            header_parameters.update(custom_headers)
+        if self.config.accept_language is not None:
+            header_parameters['accept-language'] = self._serialize.header("self.config.accept_language", self.config.accept_language, 'str')
+
+        # Construct and send request
+        request = self._client.post(url, query_parameters, header_parameters)
+        response = self._client.send(request, stream=False, **operation_config)
+
+        if response.status_code not in [204]:
+            raise models.ErrorDefinitionException(self._deserialize, response)
+
+        if raw:
+            client_raw_response = ClientRawResponse(None, response)
+            return client_raw_response
+    apply_decisions.metadata = {'url': '/subscriptions/{subscriptionId}/providers/Microsoft.Authorization/accessReviewScheduleDefinitions/{scheduleDefinitionId}/instances/{id}/applyDecisions'}
+
+    def send_reminders(
+            self, schedule_definition_id, id, custom_headers=None, raw=False, **operation_config):
+        """An action to send reminders for an access review instance.
+
+        :param schedule_definition_id: The id of the access review schedule
+         definition.
+        :type schedule_definition_id: str
+        :param id: The id of the access review instance.
+        :type id: str
+        :param dict custom_headers: headers that will be added to the request
+        :param bool raw: returns the direct response alongside the
+         deserialized response
+        :param operation_config: :ref:`Operation configuration
+         overrides<msrest:optionsforoperations>`.
+        :return: None or ClientRawResponse if raw=true
+        :rtype: None or ~msrest.pipeline.ClientRawResponse
+        :raises:
+         :class:`ErrorDefinitionException<azure.mgmt.authorization.v2018_05_01_preview.models.ErrorDefinitionException>`
+        """
+        # Construct URL
+        url = self.send_reminders.metadata['url']
+        path_format_arguments = {
+            'scheduleDefinitionId': self._serialize.url("schedule_definition_id", schedule_definition_id, 'str'),
+            'id': self._serialize.url("id", id, 'str'),
+            'subscriptionId': self._serialize.url("self.config.subscription_id", self.config.subscription_id, 'str')
+        }
+        url = self._client.format_url(url, **path_format_arguments)
+
+        # Construct parameters
+        query_parameters = {}
+        query_parameters['api-version'] = self._serialize.query("self.api_version", self.api_version, 'str')
+
+        # Construct headers
+        header_parameters = {}
+        if self.config.generate_client_request_id:
+            header_parameters['x-ms-client-request-id'] = str(uuid.uuid1())
+        if custom_headers:
+            header_parameters.update(custom_headers)
+        if self.config.accept_language is not None:
+            header_parameters['accept-language'] = self._serialize.header("self.config.accept_language", self.config.accept_language, 'str')
+
+        # Construct and send request
+        request = self._client.post(url, query_parameters, header_parameters)
+        response = self._client.send(request, stream=False, **operation_config)
+
+        if response.status_code not in [204]:
+            raise models.ErrorDefinitionException(self._deserialize, response)
+
+        if raw:
+            client_raw_response = ClientRawResponse(None, response)
+            return client_raw_response
+    send_reminders.metadata = {'url': '/subscriptions/{subscriptionId}/providers/Microsoft.Authorization/accessReviewScheduleDefinitions/{scheduleDefinitionId}/instances/{id}/sendReminders'}
+
+    def accept_recommendations(
+            self, schedule_definition_id, id, custom_headers=None, raw=False, **operation_config):
+        """An action to accept recommendations for decision in an access review
+        instance.
+
+        :param schedule_definition_id: The id of the access review schedule
+         definition.
+        :type schedule_definition_id: str
+        :param id: The id of the access review instance.
+        :type id: str
+        :param dict custom_headers: headers that will be added to the request
+        :param bool raw: returns the direct response alongside the
+         deserialized response
+        :param operation_config: :ref:`Operation configuration
+         overrides<msrest:optionsforoperations>`.
+        :return: None or ClientRawResponse if raw=true
+        :rtype: None or ~msrest.pipeline.ClientRawResponse
+        :raises:
+         :class:`ErrorDefinitionException<azure.mgmt.authorization.v2018_05_01_preview.models.ErrorDefinitionException>`
+        """
+        # Construct URL
+        url = self.accept_recommendations.metadata['url']
+        path_format_arguments = {
+            'scheduleDefinitionId': self._serialize.url("schedule_definition_id", schedule_definition_id, 'str'),
+            'id': self._serialize.url("id", id, 'str')
+        }
+        url = self._client.format_url(url, **path_format_arguments)
+
+        # Construct parameters
+        query_parameters = {}
+        query_parameters['api-version'] = self._serialize.query("self.api_version", self.api_version, 'str')
+
+        # Construct headers
+        header_parameters = {}
+        if self.config.generate_client_request_id:
+            header_parameters['x-ms-client-request-id'] = str(uuid.uuid1())
+        if custom_headers:
+            header_parameters.update(custom_headers)
+        if self.config.accept_language is not None:
+            header_parameters['accept-language'] = self._serialize.header("self.config.accept_language", self.config.accept_language, 'str')
+
+        # Construct and send request
+        request = self._client.post(url, query_parameters, header_parameters)
+        response = self._client.send(request, stream=False, **operation_config)
+
+        if response.status_code not in [204]:
+            raise models.ErrorDefinitionException(self._deserialize, response)
+
+        if raw:
+            client_raw_response = ClientRawResponse(None, response)
+            return client_raw_response
+    accept_recommendations.metadata = {'url': '/providers/Microsoft.Authorization/accessReviewScheduleDefinitions/{scheduleDefinitionId}/instances/{id}/acceptRecommendations'}
diff --git a/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2018_05_01_preview/operations/_access_review_instances_assigned_for_my_approval_operations.py b/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2018_05_01_preview/operations/_access_review_instances_assigned_for_my_approval_operations.py
new file mode 100644
index 0000000000000..8d9ab8526f463
--- /dev/null
+++ b/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2018_05_01_preview/operations/_access_review_instances_assigned_for_my_approval_operations.py
@@ -0,0 +1,168 @@
+# coding=utf-8
+# --------------------------------------------------------------------------
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License. See License.txt in the project root for
+# license information.
+#
+# Code generated by Microsoft (R) AutoRest Code Generator.
+# Changes may cause incorrect behavior and will be lost if the code is
+# regenerated.
+# --------------------------------------------------------------------------
+
+import uuid
+from msrest.pipeline import ClientRawResponse
+
+from .. import models
+
+
+class AccessReviewInstancesAssignedForMyApprovalOperations(object):
+    """AccessReviewInstancesAssignedForMyApprovalOperations operations.
+
+    You should not instantiate directly this class, but create a Client instance that will create it for you and attach it as attribute.
+
+    :param client: Client for service requests.
+    :param config: Configuration of service client.
+    :param serializer: An object model serializer.
+    :param deserializer: An object model deserializer.
+    :ivar api_version: The API version to be used with the HTTP request. Constant value: "2018-05-01-preview".
+    """
+
+    models = models
+
+    def __init__(self, client, config, serializer, deserializer):
+
+        self._client = client
+        self._serialize = serializer
+        self._deserialize = deserializer
+        self.api_version = "2018-05-01-preview"
+
+        self.config = config
+
+    def list(
+            self, schedule_definition_id, custom_headers=None, raw=False, **operation_config):
+        """Get access review instances assigned for my approval.
+
+        :param schedule_definition_id: The id of the access review schedule
+         definition.
+        :type schedule_definition_id: str
+        :param dict custom_headers: headers that will be added to the request
+        :param bool raw: returns the direct response alongside the
+         deserialized response
+        :param operation_config: :ref:`Operation configuration
+         overrides<msrest:optionsforoperations>`.
+        :return: An iterator like instance of AccessReviewInstance
+        :rtype:
+         ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewInstancePaged[~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewInstance]
+        :raises:
+         :class:`ErrorDefinitionException<azure.mgmt.authorization.v2018_05_01_preview.models.ErrorDefinitionException>`
+        """
+        def prepare_request(next_link=None):
+            if not next_link:
+                # Construct URL
+                url = self.list.metadata['url']
+                path_format_arguments = {
+                    'scheduleDefinitionId': self._serialize.url("schedule_definition_id", schedule_definition_id, 'str')
+                }
+                url = self._client.format_url(url, **path_format_arguments)
+
+                # Construct parameters
+                query_parameters = {}
+                query_parameters['api-version'] = self._serialize.query("self.api_version", self.api_version, 'str')
+
+            else:
+                url = next_link
+                query_parameters = {}
+
+            # Construct headers
+            header_parameters = {}
+            header_parameters['Accept'] = 'application/json'
+            if self.config.generate_client_request_id:
+                header_parameters['x-ms-client-request-id'] = str(uuid.uuid1())
+            if custom_headers:
+                header_parameters.update(custom_headers)
+            if self.config.accept_language is not None:
+                header_parameters['accept-language'] = self._serialize.header("self.config.accept_language", self.config.accept_language, 'str')
+
+            # Construct and send request
+            request = self._client.get(url, query_parameters, header_parameters)
+            return request
+
+        def internal_paging(next_link=None):
+            request = prepare_request(next_link)
+
+            response = self._client.send(request, stream=False, **operation_config)
+
+            if response.status_code not in [200]:
+                raise models.ErrorDefinitionException(self._deserialize, response)
+
+            return response
+
+        # Deserialize response
+        header_dict = None
+        if raw:
+            header_dict = {}
+        deserialized = models.AccessReviewInstancePaged(internal_paging, self._deserialize.dependencies, header_dict)
+
+        return deserialized
+    list.metadata = {'url': '/providers/Microsoft.Authorization/accessReviewScheduleDefinitions/{scheduleDefinitionId}/instances'}
+
+    def get_by_id(
+            self, schedule_definition_id, id, custom_headers=None, raw=False, **operation_config):
+        """Get single access review instance assigned for my approval.
+
+        :param schedule_definition_id: The id of the access review schedule
+         definition.
+        :type schedule_definition_id: str
+        :param id: The id of the access review instance.
+        :type id: str
+        :param dict custom_headers: headers that will be added to the request
+        :param bool raw: returns the direct response alongside the
+         deserialized response
+        :param operation_config: :ref:`Operation configuration
+         overrides<msrest:optionsforoperations>`.
+        :return: AccessReviewInstance or ClientRawResponse if raw=true
+        :rtype:
+         ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewInstance
+         or ~msrest.pipeline.ClientRawResponse
+        :raises:
+         :class:`ErrorDefinitionException<azure.mgmt.authorization.v2018_05_01_preview.models.ErrorDefinitionException>`
+        """
+        # Construct URL
+        url = self.get_by_id.metadata['url']
+        path_format_arguments = {
+            'scheduleDefinitionId': self._serialize.url("schedule_definition_id", schedule_definition_id, 'str'),
+            'id': self._serialize.url("id", id, 'str')
+        }
+        url = self._client.format_url(url, **path_format_arguments)
+
+        # Construct parameters
+        query_parameters = {}
+        query_parameters['api-version'] = self._serialize.query("self.api_version", self.api_version, 'str')
+
+        # Construct headers
+        header_parameters = {}
+        header_parameters['Accept'] = 'application/json'
+        if self.config.generate_client_request_id:
+            header_parameters['x-ms-client-request-id'] = str(uuid.uuid1())
+        if custom_headers:
+            header_parameters.update(custom_headers)
+        if self.config.accept_language is not None:
+            header_parameters['accept-language'] = self._serialize.header("self.config.accept_language", self.config.accept_language, 'str')
+
+        # Construct and send request
+        request = self._client.get(url, query_parameters, header_parameters)
+        response = self._client.send(request, stream=False, **operation_config)
+
+        if response.status_code not in [200]:
+            raise models.ErrorDefinitionException(self._deserialize, response)
+
+        deserialized = None
+        if response.status_code == 200:
+            deserialized = self._deserialize('AccessReviewInstance', response)
+
+        if raw:
+            client_raw_response = ClientRawResponse(deserialized, response)
+            return client_raw_response
+
+        return deserialized
+    get_by_id.metadata = {'url': '/providers/Microsoft.Authorization/accessReviewScheduleDefinitions/{scheduleDefinitionId}/instances/{id}'}
diff --git a/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2018_05_01_preview/operations/_access_review_instances_operations.py b/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2018_05_01_preview/operations/_access_review_instances_operations.py
new file mode 100644
index 0000000000000..059e1d3289cc4
--- /dev/null
+++ b/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2018_05_01_preview/operations/_access_review_instances_operations.py
@@ -0,0 +1,170 @@
+# coding=utf-8
+# --------------------------------------------------------------------------
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License. See License.txt in the project root for
+# license information.
+#
+# Code generated by Microsoft (R) AutoRest Code Generator.
+# Changes may cause incorrect behavior and will be lost if the code is
+# regenerated.
+# --------------------------------------------------------------------------
+
+import uuid
+from msrest.pipeline import ClientRawResponse
+
+from .. import models
+
+
+class AccessReviewInstancesOperations(object):
+    """AccessReviewInstancesOperations operations.
+
+    You should not instantiate directly this class, but create a Client instance that will create it for you and attach it as attribute.
+
+    :param client: Client for service requests.
+    :param config: Configuration of service client.
+    :param serializer: An object model serializer.
+    :param deserializer: An object model deserializer.
+    :ivar api_version: The API version to be used with the HTTP request. Constant value: "2018-05-01-preview".
+    """
+
+    models = models
+
+    def __init__(self, client, config, serializer, deserializer):
+
+        self._client = client
+        self._serialize = serializer
+        self._deserialize = deserializer
+        self.api_version = "2018-05-01-preview"
+
+        self.config = config
+
+    def list(
+            self, schedule_definition_id, custom_headers=None, raw=False, **operation_config):
+        """Get access review instances.
+
+        :param schedule_definition_id: The id of the access review schedule
+         definition.
+        :type schedule_definition_id: str
+        :param dict custom_headers: headers that will be added to the request
+        :param bool raw: returns the direct response alongside the
+         deserialized response
+        :param operation_config: :ref:`Operation configuration
+         overrides<msrest:optionsforoperations>`.
+        :return: An iterator like instance of AccessReviewInstance
+        :rtype:
+         ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewInstancePaged[~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewInstance]
+        :raises:
+         :class:`ErrorDefinitionException<azure.mgmt.authorization.v2018_05_01_preview.models.ErrorDefinitionException>`
+        """
+        def prepare_request(next_link=None):
+            if not next_link:
+                # Construct URL
+                url = self.list.metadata['url']
+                path_format_arguments = {
+                    'scheduleDefinitionId': self._serialize.url("schedule_definition_id", schedule_definition_id, 'str'),
+                    'subscriptionId': self._serialize.url("self.config.subscription_id", self.config.subscription_id, 'str')
+                }
+                url = self._client.format_url(url, **path_format_arguments)
+
+                # Construct parameters
+                query_parameters = {}
+                query_parameters['api-version'] = self._serialize.query("self.api_version", self.api_version, 'str')
+
+            else:
+                url = next_link
+                query_parameters = {}
+
+            # Construct headers
+            header_parameters = {}
+            header_parameters['Accept'] = 'application/json'
+            if self.config.generate_client_request_id:
+                header_parameters['x-ms-client-request-id'] = str(uuid.uuid1())
+            if custom_headers:
+                header_parameters.update(custom_headers)
+            if self.config.accept_language is not None:
+                header_parameters['accept-language'] = self._serialize.header("self.config.accept_language", self.config.accept_language, 'str')
+
+            # Construct and send request
+            request = self._client.get(url, query_parameters, header_parameters)
+            return request
+
+        def internal_paging(next_link=None):
+            request = prepare_request(next_link)
+
+            response = self._client.send(request, stream=False, **operation_config)
+
+            if response.status_code not in [200]:
+                raise models.ErrorDefinitionException(self._deserialize, response)
+
+            return response
+
+        # Deserialize response
+        header_dict = None
+        if raw:
+            header_dict = {}
+        deserialized = models.AccessReviewInstancePaged(internal_paging, self._deserialize.dependencies, header_dict)
+
+        return deserialized
+    list.metadata = {'url': '/subscriptions/{subscriptionId}/providers/Microsoft.Authorization/accessReviewScheduleDefinitions/{scheduleDefinitionId}/instances'}
+
+    def get_by_id(
+            self, schedule_definition_id, id, custom_headers=None, raw=False, **operation_config):
+        """Get access review instances.
+
+        :param schedule_definition_id: The id of the access review schedule
+         definition.
+        :type schedule_definition_id: str
+        :param id: The id of the access review instance.
+        :type id: str
+        :param dict custom_headers: headers that will be added to the request
+        :param bool raw: returns the direct response alongside the
+         deserialized response
+        :param operation_config: :ref:`Operation configuration
+         overrides<msrest:optionsforoperations>`.
+        :return: AccessReviewInstance or ClientRawResponse if raw=true
+        :rtype:
+         ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewInstance
+         or ~msrest.pipeline.ClientRawResponse
+        :raises:
+         :class:`ErrorDefinitionException<azure.mgmt.authorization.v2018_05_01_preview.models.ErrorDefinitionException>`
+        """
+        # Construct URL
+        url = self.get_by_id.metadata['url']
+        path_format_arguments = {
+            'scheduleDefinitionId': self._serialize.url("schedule_definition_id", schedule_definition_id, 'str'),
+            'id': self._serialize.url("id", id, 'str'),
+            'subscriptionId': self._serialize.url("self.config.subscription_id", self.config.subscription_id, 'str')
+        }
+        url = self._client.format_url(url, **path_format_arguments)
+
+        # Construct parameters
+        query_parameters = {}
+        query_parameters['api-version'] = self._serialize.query("self.api_version", self.api_version, 'str')
+
+        # Construct headers
+        header_parameters = {}
+        header_parameters['Accept'] = 'application/json'
+        if self.config.generate_client_request_id:
+            header_parameters['x-ms-client-request-id'] = str(uuid.uuid1())
+        if custom_headers:
+            header_parameters.update(custom_headers)
+        if self.config.accept_language is not None:
+            header_parameters['accept-language'] = self._serialize.header("self.config.accept_language", self.config.accept_language, 'str')
+
+        # Construct and send request
+        request = self._client.get(url, query_parameters, header_parameters)
+        response = self._client.send(request, stream=False, **operation_config)
+
+        if response.status_code not in [200]:
+            raise models.ErrorDefinitionException(self._deserialize, response)
+
+        deserialized = None
+        if response.status_code == 200:
+            deserialized = self._deserialize('AccessReviewInstance', response)
+
+        if raw:
+            client_raw_response = ClientRawResponse(deserialized, response)
+            return client_raw_response
+
+        return deserialized
+    get_by_id.metadata = {'url': '/subscriptions/{subscriptionId}/providers/Microsoft.Authorization/accessReviewScheduleDefinitions/{scheduleDefinitionId}/instances/{id}'}
diff --git a/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2018_05_01_preview/operations/_access_review_schedule_definitions_assigned_for_my_approval_operations.py b/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2018_05_01_preview/operations/_access_review_schedule_definitions_assigned_for_my_approval_operations.py
new file mode 100644
index 0000000000000..7aa0afdaf94ac
--- /dev/null
+++ b/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2018_05_01_preview/operations/_access_review_schedule_definitions_assigned_for_my_approval_operations.py
@@ -0,0 +1,100 @@
+# coding=utf-8
+# --------------------------------------------------------------------------
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License. See License.txt in the project root for
+# license information.
+#
+# Code generated by Microsoft (R) AutoRest Code Generator.
+# Changes may cause incorrect behavior and will be lost if the code is
+# regenerated.
+# --------------------------------------------------------------------------
+
+import uuid
+from msrest.pipeline import ClientRawResponse
+
+from .. import models
+
+
+class AccessReviewScheduleDefinitionsAssignedForMyApprovalOperations(object):
+    """AccessReviewScheduleDefinitionsAssignedForMyApprovalOperations operations.
+
+    You should not instantiate directly this class, but create a Client instance that will create it for you and attach it as attribute.
+
+    :param client: Client for service requests.
+    :param config: Configuration of service client.
+    :param serializer: An object model serializer.
+    :param deserializer: An object model deserializer.
+    :ivar api_version: The API version to be used with the HTTP request. Constant value: "2018-05-01-preview".
+    """
+
+    models = models
+
+    def __init__(self, client, config, serializer, deserializer):
+
+        self._client = client
+        self._serialize = serializer
+        self._deserialize = deserializer
+        self.api_version = "2018-05-01-preview"
+
+        self.config = config
+
+    def list(
+            self, custom_headers=None, raw=False, **operation_config):
+        """Get access review instances assigned for my approval.
+
+        :param dict custom_headers: headers that will be added to the request
+        :param bool raw: returns the direct response alongside the
+         deserialized response
+        :param operation_config: :ref:`Operation configuration
+         overrides<msrest:optionsforoperations>`.
+        :return: An iterator like instance of AccessReviewScheduleDefinition
+        :rtype:
+         ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewScheduleDefinitionPaged[~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewScheduleDefinition]
+        :raises:
+         :class:`ErrorDefinitionException<azure.mgmt.authorization.v2018_05_01_preview.models.ErrorDefinitionException>`
+        """
+        def prepare_request(next_link=None):
+            if not next_link:
+                # Construct URL
+                url = self.list.metadata['url']
+
+                # Construct parameters
+                query_parameters = {}
+                query_parameters['api-version'] = self._serialize.query("self.api_version", self.api_version, 'str')
+
+            else:
+                url = next_link
+                query_parameters = {}
+
+            # Construct headers
+            header_parameters = {}
+            header_parameters['Accept'] = 'application/json'
+            if self.config.generate_client_request_id:
+                header_parameters['x-ms-client-request-id'] = str(uuid.uuid1())
+            if custom_headers:
+                header_parameters.update(custom_headers)
+            if self.config.accept_language is not None:
+                header_parameters['accept-language'] = self._serialize.header("self.config.accept_language", self.config.accept_language, 'str')
+
+            # Construct and send request
+            request = self._client.get(url, query_parameters, header_parameters)
+            return request
+
+        def internal_paging(next_link=None):
+            request = prepare_request(next_link)
+
+            response = self._client.send(request, stream=False, **operation_config)
+
+            if response.status_code not in [200]:
+                raise models.ErrorDefinitionException(self._deserialize, response)
+
+            return response
+
+        # Deserialize response
+        header_dict = None
+        if raw:
+            header_dict = {}
+        deserialized = models.AccessReviewScheduleDefinitionPaged(internal_paging, self._deserialize.dependencies, header_dict)
+
+        return deserialized
+    list.metadata = {'url': '/providers/Microsoft.Authorization/accessReviewScheduleDefinitions'}
diff --git a/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2018_05_01_preview/operations/_access_review_schedule_definitions_operations.py b/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2018_05_01_preview/operations/_access_review_schedule_definitions_operations.py
new file mode 100644
index 0000000000000..ccfad23cb52c9
--- /dev/null
+++ b/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2018_05_01_preview/operations/_access_review_schedule_definitions_operations.py
@@ -0,0 +1,331 @@
+# coding=utf-8
+# --------------------------------------------------------------------------
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License. See License.txt in the project root for
+# license information.
+#
+# Code generated by Microsoft (R) AutoRest Code Generator.
+# Changes may cause incorrect behavior and will be lost if the code is
+# regenerated.
+# --------------------------------------------------------------------------
+
+import uuid
+from msrest.pipeline import ClientRawResponse
+
+from .. import models
+
+
+class AccessReviewScheduleDefinitionsOperations(object):
+    """AccessReviewScheduleDefinitionsOperations operations.
+
+    You should not instantiate directly this class, but create a Client instance that will create it for you and attach it as attribute.
+
+    :param client: Client for service requests.
+    :param config: Configuration of service client.
+    :param serializer: An object model serializer.
+    :param deserializer: An object model deserializer.
+    :ivar api_version: The API version to be used with the HTTP request. Constant value: "2018-05-01-preview".
+    """
+
+    models = models
+
+    def __init__(self, client, config, serializer, deserializer):
+
+        self._client = client
+        self._serialize = serializer
+        self._deserialize = deserializer
+        self.api_version = "2018-05-01-preview"
+
+        self.config = config
+
+    def list(
+            self, custom_headers=None, raw=False, **operation_config):
+        """Get access review schedule definitions.
+
+        :param dict custom_headers: headers that will be added to the request
+        :param bool raw: returns the direct response alongside the
+         deserialized response
+        :param operation_config: :ref:`Operation configuration
+         overrides<msrest:optionsforoperations>`.
+        :return: An iterator like instance of AccessReviewScheduleDefinition
+        :rtype:
+         ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewScheduleDefinitionPaged[~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewScheduleDefinition]
+        :raises:
+         :class:`ErrorDefinitionException<azure.mgmt.authorization.v2018_05_01_preview.models.ErrorDefinitionException>`
+        """
+        def prepare_request(next_link=None):
+            if not next_link:
+                # Construct URL
+                url = self.list.metadata['url']
+                path_format_arguments = {
+                    'subscriptionId': self._serialize.url("self.config.subscription_id", self.config.subscription_id, 'str')
+                }
+                url = self._client.format_url(url, **path_format_arguments)
+
+                # Construct parameters
+                query_parameters = {}
+                query_parameters['api-version'] = self._serialize.query("self.api_version", self.api_version, 'str')
+
+            else:
+                url = next_link
+                query_parameters = {}
+
+            # Construct headers
+            header_parameters = {}
+            header_parameters['Accept'] = 'application/json'
+            if self.config.generate_client_request_id:
+                header_parameters['x-ms-client-request-id'] = str(uuid.uuid1())
+            if custom_headers:
+                header_parameters.update(custom_headers)
+            if self.config.accept_language is not None:
+                header_parameters['accept-language'] = self._serialize.header("self.config.accept_language", self.config.accept_language, 'str')
+
+            # Construct and send request
+            request = self._client.get(url, query_parameters, header_parameters)
+            return request
+
+        def internal_paging(next_link=None):
+            request = prepare_request(next_link)
+
+            response = self._client.send(request, stream=False, **operation_config)
+
+            if response.status_code not in [200]:
+                raise models.ErrorDefinitionException(self._deserialize, response)
+
+            return response
+
+        # Deserialize response
+        header_dict = None
+        if raw:
+            header_dict = {}
+        deserialized = models.AccessReviewScheduleDefinitionPaged(internal_paging, self._deserialize.dependencies, header_dict)
+
+        return deserialized
+    list.metadata = {'url': '/subscriptions/{subscriptionId}/providers/Microsoft.Authorization/accessReviewScheduleDefinitions'}
+
+    def get_by_id(
+            self, schedule_definition_id, custom_headers=None, raw=False, **operation_config):
+        """Get single access review definition.
+
+        :param schedule_definition_id: The id of the access review schedule
+         definition.
+        :type schedule_definition_id: str
+        :param dict custom_headers: headers that will be added to the request
+        :param bool raw: returns the direct response alongside the
+         deserialized response
+        :param operation_config: :ref:`Operation configuration
+         overrides<msrest:optionsforoperations>`.
+        :return: AccessReviewScheduleDefinition or ClientRawResponse if
+         raw=true
+        :rtype:
+         ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewScheduleDefinition
+         or ~msrest.pipeline.ClientRawResponse
+        :raises:
+         :class:`ErrorDefinitionException<azure.mgmt.authorization.v2018_05_01_preview.models.ErrorDefinitionException>`
+        """
+        # Construct URL
+        url = self.get_by_id.metadata['url']
+        path_format_arguments = {
+            'scheduleDefinitionId': self._serialize.url("schedule_definition_id", schedule_definition_id, 'str'),
+            'subscriptionId': self._serialize.url("self.config.subscription_id", self.config.subscription_id, 'str')
+        }
+        url = self._client.format_url(url, **path_format_arguments)
+
+        # Construct parameters
+        query_parameters = {}
+        query_parameters['api-version'] = self._serialize.query("self.api_version", self.api_version, 'str')
+
+        # Construct headers
+        header_parameters = {}
+        header_parameters['Accept'] = 'application/json'
+        if self.config.generate_client_request_id:
+            header_parameters['x-ms-client-request-id'] = str(uuid.uuid1())
+        if custom_headers:
+            header_parameters.update(custom_headers)
+        if self.config.accept_language is not None:
+            header_parameters['accept-language'] = self._serialize.header("self.config.accept_language", self.config.accept_language, 'str')
+
+        # Construct and send request
+        request = self._client.get(url, query_parameters, header_parameters)
+        response = self._client.send(request, stream=False, **operation_config)
+
+        if response.status_code not in [200]:
+            raise models.ErrorDefinitionException(self._deserialize, response)
+
+        deserialized = None
+        if response.status_code == 200:
+            deserialized = self._deserialize('AccessReviewScheduleDefinition', response)
+
+        if raw:
+            client_raw_response = ClientRawResponse(deserialized, response)
+            return client_raw_response
+
+        return deserialized
+    get_by_id.metadata = {'url': '/subscriptions/{subscriptionId}/providers/Microsoft.Authorization/accessReviewScheduleDefinitions/{scheduleDefinitionId}'}
+
+    def delete_by_id(
+            self, schedule_definition_id, custom_headers=None, raw=False, **operation_config):
+        """Delete access review schedule definition.
+
+        :param schedule_definition_id: The id of the access review schedule
+         definition.
+        :type schedule_definition_id: str
+        :param dict custom_headers: headers that will be added to the request
+        :param bool raw: returns the direct response alongside the
+         deserialized response
+        :param operation_config: :ref:`Operation configuration
+         overrides<msrest:optionsforoperations>`.
+        :return: None or ClientRawResponse if raw=true
+        :rtype: None or ~msrest.pipeline.ClientRawResponse
+        :raises:
+         :class:`ErrorDefinitionException<azure.mgmt.authorization.v2018_05_01_preview.models.ErrorDefinitionException>`
+        """
+        # Construct URL
+        url = self.delete_by_id.metadata['url']
+        path_format_arguments = {
+            'scheduleDefinitionId': self._serialize.url("schedule_definition_id", schedule_definition_id, 'str'),
+            'subscriptionId': self._serialize.url("self.config.subscription_id", self.config.subscription_id, 'str')
+        }
+        url = self._client.format_url(url, **path_format_arguments)
+
+        # Construct parameters
+        query_parameters = {}
+        query_parameters['api-version'] = self._serialize.query("self.api_version", self.api_version, 'str')
+
+        # Construct headers
+        header_parameters = {}
+        if self.config.generate_client_request_id:
+            header_parameters['x-ms-client-request-id'] = str(uuid.uuid1())
+        if custom_headers:
+            header_parameters.update(custom_headers)
+        if self.config.accept_language is not None:
+            header_parameters['accept-language'] = self._serialize.header("self.config.accept_language", self.config.accept_language, 'str')
+
+        # Construct and send request
+        request = self._client.delete(url, query_parameters, header_parameters)
+        response = self._client.send(request, stream=False, **operation_config)
+
+        if response.status_code not in [200, 204]:
+            raise models.ErrorDefinitionException(self._deserialize, response)
+
+        if raw:
+            client_raw_response = ClientRawResponse(None, response)
+            return client_raw_response
+    delete_by_id.metadata = {'url': '/subscriptions/{subscriptionId}/providers/Microsoft.Authorization/accessReviewScheduleDefinitions/{scheduleDefinitionId}'}
+
+    def create_or_update_by_id(
+            self, schedule_definition_id, properties, custom_headers=None, raw=False, **operation_config):
+        """Create or Update access review schedule definition.
+
+        :param schedule_definition_id: The id of the access review schedule
+         definition.
+        :type schedule_definition_id: str
+        :param properties: Access review schedule definition properties.
+        :type properties:
+         ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewScheduleDefinitionProperties
+        :param dict custom_headers: headers that will be added to the request
+        :param bool raw: returns the direct response alongside the
+         deserialized response
+        :param operation_config: :ref:`Operation configuration
+         overrides<msrest:optionsforoperations>`.
+        :return: AccessReviewScheduleDefinition or ClientRawResponse if
+         raw=true
+        :rtype:
+         ~azure.mgmt.authorization.v2018_05_01_preview.models.AccessReviewScheduleDefinition
+         or ~msrest.pipeline.ClientRawResponse
+        :raises:
+         :class:`ErrorDefinitionException<azure.mgmt.authorization.v2018_05_01_preview.models.ErrorDefinitionException>`
+        """
+        # Construct URL
+        url = self.create_or_update_by_id.metadata['url']
+        path_format_arguments = {
+            'scheduleDefinitionId': self._serialize.url("schedule_definition_id", schedule_definition_id, 'str'),
+            'subscriptionId': self._serialize.url("self.config.subscription_id", self.config.subscription_id, 'str')
+        }
+        url = self._client.format_url(url, **path_format_arguments)
+
+        # Construct parameters
+        query_parameters = {}
+        query_parameters['api-version'] = self._serialize.query("self.api_version", self.api_version, 'str')
+
+        # Construct headers
+        header_parameters = {}
+        header_parameters['Accept'] = 'application/json'
+        header_parameters['Content-Type'] = 'application/json; charset=utf-8'
+        if self.config.generate_client_request_id:
+            header_parameters['x-ms-client-request-id'] = str(uuid.uuid1())
+        if custom_headers:
+            header_parameters.update(custom_headers)
+        if self.config.accept_language is not None:
+            header_parameters['accept-language'] = self._serialize.header("self.config.accept_language", self.config.accept_language, 'str')
+
+        # Construct body
+        body_content = self._serialize.body(properties, 'AccessReviewScheduleDefinitionProperties')
+
+        # Construct and send request
+        request = self._client.put(url, query_parameters, header_parameters, body_content)
+        response = self._client.send(request, stream=False, **operation_config)
+
+        if response.status_code not in [200]:
+            raise models.ErrorDefinitionException(self._deserialize, response)
+
+        deserialized = None
+        if response.status_code == 200:
+            deserialized = self._deserialize('AccessReviewScheduleDefinition', response)
+
+        if raw:
+            client_raw_response = ClientRawResponse(deserialized, response)
+            return client_raw_response
+
+        return deserialized
+    create_or_update_by_id.metadata = {'url': '/subscriptions/{subscriptionId}/providers/Microsoft.Authorization/accessReviewScheduleDefinitions/{scheduleDefinitionId}'}
+
+    def stop(
+            self, schedule_definition_id, custom_headers=None, raw=False, **operation_config):
+        """Stop access review definition.
+
+        :param schedule_definition_id: The id of the access review schedule
+         definition.
+        :type schedule_definition_id: str
+        :param dict custom_headers: headers that will be added to the request
+        :param bool raw: returns the direct response alongside the
+         deserialized response
+        :param operation_config: :ref:`Operation configuration
+         overrides<msrest:optionsforoperations>`.
+        :return: None or ClientRawResponse if raw=true
+        :rtype: None or ~msrest.pipeline.ClientRawResponse
+        :raises:
+         :class:`ErrorDefinitionException<azure.mgmt.authorization.v2018_05_01_preview.models.ErrorDefinitionException>`
+        """
+        # Construct URL
+        url = self.stop.metadata['url']
+        path_format_arguments = {
+            'scheduleDefinitionId': self._serialize.url("schedule_definition_id", schedule_definition_id, 'str'),
+            'subscriptionId': self._serialize.url("self.config.subscription_id", self.config.subscription_id, 'str')
+        }
+        url = self._client.format_url(url, **path_format_arguments)
+
+        # Construct parameters
+        query_parameters = {}
+        query_parameters['api-version'] = self._serialize.query("self.api_version", self.api_version, 'str')
+
+        # Construct headers
+        header_parameters = {}
+        if self.config.generate_client_request_id:
+            header_parameters['x-ms-client-request-id'] = str(uuid.uuid1())
+        if custom_headers:
+            header_parameters.update(custom_headers)
+        if self.config.accept_language is not None:
+            header_parameters['accept-language'] = self._serialize.header("self.config.accept_language", self.config.accept_language, 'str')
+
+        # Construct and send request
+        request = self._client.post(url, query_parameters, header_parameters)
+        response = self._client.send(request, stream=False, **operation_config)
+
+        if response.status_code not in [204]:
+            raise models.ErrorDefinitionException(self._deserialize, response)
+
+        if raw:
+            client_raw_response = ClientRawResponse(None, response)
+            return client_raw_response
+    stop.metadata = {'url': '/subscriptions/{subscriptionId}/providers/Microsoft.Authorization/accessReviewScheduleDefinitions/{scheduleDefinitionId}/stop'}
diff --git a/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2018_05_01_preview/operations/_operations.py b/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2018_05_01_preview/operations/_operations.py
new file mode 100644
index 0000000000000..3b6b4072fac71
--- /dev/null
+++ b/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2018_05_01_preview/operations/_operations.py
@@ -0,0 +1,100 @@
+# coding=utf-8
+# --------------------------------------------------------------------------
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License. See License.txt in the project root for
+# license information.
+#
+# Code generated by Microsoft (R) AutoRest Code Generator.
+# Changes may cause incorrect behavior and will be lost if the code is
+# regenerated.
+# --------------------------------------------------------------------------
+
+import uuid
+from msrest.pipeline import ClientRawResponse
+
+from .. import models
+
+
+class Operations(object):
+    """Operations operations.
+
+    You should not instantiate directly this class, but create a Client instance that will create it for you and attach it as attribute.
+
+    :param client: Client for service requests.
+    :param config: Configuration of service client.
+    :param serializer: An object model serializer.
+    :param deserializer: An object model deserializer.
+    :ivar api_version: The API version to be used with the HTTP request. Constant value: "2018-05-01-preview".
+    """
+
+    models = models
+
+    def __init__(self, client, config, serializer, deserializer):
+
+        self._client = client
+        self._serialize = serializer
+        self._deserialize = deserializer
+        self.api_version = "2018-05-01-preview"
+
+        self.config = config
+
+    def list(
+            self, custom_headers=None, raw=False, **operation_config):
+        """Lists the operations available from this provider.
+
+        :param dict custom_headers: headers that will be added to the request
+        :param bool raw: returns the direct response alongside the
+         deserialized response
+        :param operation_config: :ref:`Operation configuration
+         overrides<msrest:optionsforoperations>`.
+        :return: An iterator like instance of Operation
+        :rtype:
+         ~azure.mgmt.authorization.v2018_05_01_preview.models.OperationPaged[~azure.mgmt.authorization.v2018_05_01_preview.models.Operation]
+        :raises:
+         :class:`ErrorDefinitionException<azure.mgmt.authorization.v2018_05_01_preview.models.ErrorDefinitionException>`
+        """
+        def prepare_request(next_link=None):
+            if not next_link:
+                # Construct URL
+                url = self.list.metadata['url']
+
+                # Construct parameters
+                query_parameters = {}
+                query_parameters['api-version'] = self._serialize.query("self.api_version", self.api_version, 'str')
+
+            else:
+                url = next_link
+                query_parameters = {}
+
+            # Construct headers
+            header_parameters = {}
+            header_parameters['Accept'] = 'application/json'
+            if self.config.generate_client_request_id:
+                header_parameters['x-ms-client-request-id'] = str(uuid.uuid1())
+            if custom_headers:
+                header_parameters.update(custom_headers)
+            if self.config.accept_language is not None:
+                header_parameters['accept-language'] = self._serialize.header("self.config.accept_language", self.config.accept_language, 'str')
+
+            # Construct and send request
+            request = self._client.get(url, query_parameters, header_parameters)
+            return request
+
+        def internal_paging(next_link=None):
+            request = prepare_request(next_link)
+
+            response = self._client.send(request, stream=False, **operation_config)
+
+            if response.status_code not in [200]:
+                raise models.ErrorDefinitionException(self._deserialize, response)
+
+            return response
+
+        # Deserialize response
+        header_dict = None
+        if raw:
+            header_dict = {}
+        deserialized = models.OperationPaged(internal_paging, self._deserialize.dependencies, header_dict)
+
+        return deserialized
+    list.metadata = {'url': '/providers/Microsoft.Authorization/operations'}
diff --git a/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2018_05_01_preview/version.py b/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2018_05_01_preview/version.py
new file mode 100644
index 0000000000000..7921c843fb544
--- /dev/null
+++ b/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2018_05_01_preview/version.py
@@ -0,0 +1,13 @@
+# coding=utf-8
+# --------------------------------------------------------------------------
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License. See License.txt in the project root for
+# license information.
+#
+# Code generated by Microsoft (R) AutoRest Code Generator.
+# Changes may cause incorrect behavior and will be lost if the code is
+# regenerated.
+# --------------------------------------------------------------------------
+
+VERSION = "2018-05-01-preview"
+
diff --git a/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2020_04_01_preview/models/__init__.py b/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2020_04_01_preview/models/__init__.py
index 7fa9d33fff9dc..4d9a8b75c150e 100644
--- a/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2020_04_01_preview/models/__init__.py
+++ b/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2020_04_01_preview/models/__init__.py
@@ -10,10 +10,14 @@
 # --------------------------------------------------------------------------
 
 try:
+    from ._models_py3 import ErrorAdditionalInfo
+    from ._models_py3 import ErrorResponse, ErrorResponseException
     from ._models_py3 import RoleAssignment
     from ._models_py3 import RoleAssignmentCreateParameters
     from ._models_py3 import RoleAssignmentFilter
 except (SyntaxError, ImportError):
+    from ._models import ErrorAdditionalInfo
+    from ._models import ErrorResponse, ErrorResponseException
     from ._models import RoleAssignment
     from ._models import RoleAssignmentCreateParameters
     from ._models import RoleAssignmentFilter
@@ -23,6 +27,8 @@
 )
 
 __all__ = [
+    'ErrorAdditionalInfo',
+    'ErrorResponse', 'ErrorResponseException',
     'RoleAssignment',
     'RoleAssignmentCreateParameters',
     'RoleAssignmentFilter',
diff --git a/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2020_04_01_preview/models/_models.py b/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2020_04_01_preview/models/_models.py
index ca78bb76ffd1a..15413551d45bf 100644
--- a/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2020_04_01_preview/models/_models.py
+++ b/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2020_04_01_preview/models/_models.py
@@ -10,6 +10,7 @@
 # --------------------------------------------------------------------------
 
 from msrest.serialization import Model
+from msrest.exceptions import HttpOperationError
 
 
 class CloudError(Model):
@@ -20,6 +21,95 @@ class CloudError(Model):
     }
 
 
+class ErrorAdditionalInfo(Model):
+    """The resource management error additional info.
+
+    Variables are only populated by the server, and will be ignored when
+    sending a request.
+
+    :ivar type: The additional info type.
+    :vartype type: str
+    :ivar info: The additional info.
+    :vartype info: object
+    """
+
+    _validation = {
+        'type': {'readonly': True},
+        'info': {'readonly': True},
+    }
+
+    _attribute_map = {
+        'type': {'key': 'type', 'type': 'str'},
+        'info': {'key': 'info', 'type': 'object'},
+    }
+
+    def __init__(self, **kwargs):
+        super(ErrorAdditionalInfo, self).__init__(**kwargs)
+        self.type = None
+        self.info = None
+
+
+class ErrorResponse(Model):
+    """Error Response.
+
+    Common error response for all Azure Resource Manager APIs to return error
+    details for failed operations. (This also follows the OData error response
+    format.).
+
+    Variables are only populated by the server, and will be ignored when
+    sending a request.
+
+    :ivar code: The error code.
+    :vartype code: str
+    :ivar message: The error message.
+    :vartype message: str
+    :ivar target: The error target.
+    :vartype target: str
+    :ivar details: The error details.
+    :vartype details:
+     list[~azure.mgmt.authorization.v2020_04_01_preview.models.ErrorResponse]
+    :ivar additional_info: The error additional info.
+    :vartype additional_info:
+     list[~azure.mgmt.authorization.v2020_04_01_preview.models.ErrorAdditionalInfo]
+    """
+
+    _validation = {
+        'code': {'readonly': True},
+        'message': {'readonly': True},
+        'target': {'readonly': True},
+        'details': {'readonly': True},
+        'additional_info': {'readonly': True},
+    }
+
+    _attribute_map = {
+        'code': {'key': 'code', 'type': 'str'},
+        'message': {'key': 'message', 'type': 'str'},
+        'target': {'key': 'target', 'type': 'str'},
+        'details': {'key': 'details', 'type': '[ErrorResponse]'},
+        'additional_info': {'key': 'additionalInfo', 'type': '[ErrorAdditionalInfo]'},
+    }
+
+    def __init__(self, **kwargs):
+        super(ErrorResponse, self).__init__(**kwargs)
+        self.code = None
+        self.message = None
+        self.target = None
+        self.details = None
+        self.additional_info = None
+
+
+class ErrorResponseException(HttpOperationError):
+    """Server responsed with exception of type: 'ErrorResponse'.
+
+    :param deserialize: A deserializer
+    :param response: Server response to be deserialized.
+    """
+
+    def __init__(self, deserialize, response, *args):
+
+        super(ErrorResponseException, self).__init__(deserialize, response, 'ErrorResponse', *args)
+
+
 class RoleAssignment(Model):
     """Role Assignments.
 
@@ -54,8 +144,19 @@ class RoleAssignment(Model):
      StringEqualsIgnoreCase 'foo_storage_container'
     :type condition: str
     :param condition_version: Version of the condition. Currently accepted
-     values are '1.0' or '2.0'
+     value is '2.0'
     :type condition_version: str
+    :param created_on: Time it was created
+    :type created_on: datetime
+    :param updated_on: Time it was updated
+    :type updated_on: datetime
+    :param created_by: Id of the user who created the assignment
+    :type created_by: str
+    :param updated_by: Id of the user who updated the assignment
+    :type updated_by: str
+    :param delegated_managed_identity_resource_id: Id of the delegated managed
+     identity resource
+    :type delegated_managed_identity_resource_id: str
     """
 
     _validation = {
@@ -76,6 +177,11 @@ class RoleAssignment(Model):
         'description': {'key': 'properties.description', 'type': 'str'},
         'condition': {'key': 'properties.condition', 'type': 'str'},
         'condition_version': {'key': 'properties.conditionVersion', 'type': 'str'},
+        'created_on': {'key': 'properties.createdOn', 'type': 'iso-8601'},
+        'updated_on': {'key': 'properties.updatedOn', 'type': 'iso-8601'},
+        'created_by': {'key': 'properties.createdBy', 'type': 'str'},
+        'updated_by': {'key': 'properties.updatedBy', 'type': 'str'},
+        'delegated_managed_identity_resource_id': {'key': 'properties.delegatedManagedIdentityResourceId', 'type': 'str'},
     }
 
     def __init__(self, **kwargs):
@@ -91,6 +197,11 @@ def __init__(self, **kwargs):
         self.description = kwargs.get('description', None)
         self.condition = kwargs.get('condition', None)
         self.condition_version = kwargs.get('condition_version', None)
+        self.created_on = kwargs.get('created_on', None)
+        self.updated_on = kwargs.get('updated_on', None)
+        self.created_by = kwargs.get('created_by', None)
+        self.updated_by = kwargs.get('updated_by', None)
+        self.delegated_managed_identity_resource_id = kwargs.get('delegated_managed_identity_resource_id', None)
 
 
 class RoleAssignmentCreateParameters(Model):
@@ -116,9 +227,13 @@ class RoleAssignmentCreateParameters(Model):
     :type can_delegate: bool
     :param description: Description of role assignment
     :type description: str
-    :param condition: The conditions on the role assignment
+    :param condition: The conditions on the role assignment. This limits the
+     resources it can be assigned to. e.g.:
+     @Resource[Microsoft.Storage/storageAccounts/blobServices/containers:ContainerName]
+     StringEqualsIgnoreCase 'foo_storage_container'
     :type condition: str
-    :param condition_version: Version of the condition
+    :param condition_version: Version of the condition. Currently accepted
+     value is '2.0'
     :type condition_version: str
     """
 
diff --git a/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2020_04_01_preview/models/_models_py3.py b/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2020_04_01_preview/models/_models_py3.py
index 2d4acd255fca7..7c14ba2ba94c2 100644
--- a/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2020_04_01_preview/models/_models_py3.py
+++ b/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2020_04_01_preview/models/_models_py3.py
@@ -10,6 +10,7 @@
 # --------------------------------------------------------------------------
 
 from msrest.serialization import Model
+from msrest.exceptions import HttpOperationError
 
 
 class CloudError(Model):
@@ -20,6 +21,95 @@ class CloudError(Model):
     }
 
 
+class ErrorAdditionalInfo(Model):
+    """The resource management error additional info.
+
+    Variables are only populated by the server, and will be ignored when
+    sending a request.
+
+    :ivar type: The additional info type.
+    :vartype type: str
+    :ivar info: The additional info.
+    :vartype info: object
+    """
+
+    _validation = {
+        'type': {'readonly': True},
+        'info': {'readonly': True},
+    }
+
+    _attribute_map = {
+        'type': {'key': 'type', 'type': 'str'},
+        'info': {'key': 'info', 'type': 'object'},
+    }
+
+    def __init__(self, **kwargs) -> None:
+        super(ErrorAdditionalInfo, self).__init__(**kwargs)
+        self.type = None
+        self.info = None
+
+
+class ErrorResponse(Model):
+    """Error Response.
+
+    Common error response for all Azure Resource Manager APIs to return error
+    details for failed operations. (This also follows the OData error response
+    format.).
+
+    Variables are only populated by the server, and will be ignored when
+    sending a request.
+
+    :ivar code: The error code.
+    :vartype code: str
+    :ivar message: The error message.
+    :vartype message: str
+    :ivar target: The error target.
+    :vartype target: str
+    :ivar details: The error details.
+    :vartype details:
+     list[~azure.mgmt.authorization.v2020_04_01_preview.models.ErrorResponse]
+    :ivar additional_info: The error additional info.
+    :vartype additional_info:
+     list[~azure.mgmt.authorization.v2020_04_01_preview.models.ErrorAdditionalInfo]
+    """
+
+    _validation = {
+        'code': {'readonly': True},
+        'message': {'readonly': True},
+        'target': {'readonly': True},
+        'details': {'readonly': True},
+        'additional_info': {'readonly': True},
+    }
+
+    _attribute_map = {
+        'code': {'key': 'code', 'type': 'str'},
+        'message': {'key': 'message', 'type': 'str'},
+        'target': {'key': 'target', 'type': 'str'},
+        'details': {'key': 'details', 'type': '[ErrorResponse]'},
+        'additional_info': {'key': 'additionalInfo', 'type': '[ErrorAdditionalInfo]'},
+    }
+
+    def __init__(self, **kwargs) -> None:
+        super(ErrorResponse, self).__init__(**kwargs)
+        self.code = None
+        self.message = None
+        self.target = None
+        self.details = None
+        self.additional_info = None
+
+
+class ErrorResponseException(HttpOperationError):
+    """Server responsed with exception of type: 'ErrorResponse'.
+
+    :param deserialize: A deserializer
+    :param response: Server response to be deserialized.
+    """
+
+    def __init__(self, deserialize, response, *args):
+
+        super(ErrorResponseException, self).__init__(deserialize, response, 'ErrorResponse', *args)
+
+
 class RoleAssignment(Model):
     """Role Assignments.
 
@@ -54,8 +144,19 @@ class RoleAssignment(Model):
      StringEqualsIgnoreCase 'foo_storage_container'
     :type condition: str
     :param condition_version: Version of the condition. Currently accepted
-     values are '1.0' or '2.0'
+     value is '2.0'
     :type condition_version: str
+    :param created_on: Time it was created
+    :type created_on: datetime
+    :param updated_on: Time it was updated
+    :type updated_on: datetime
+    :param created_by: Id of the user who created the assignment
+    :type created_by: str
+    :param updated_by: Id of the user who updated the assignment
+    :type updated_by: str
+    :param delegated_managed_identity_resource_id: Id of the delegated managed
+     identity resource
+    :type delegated_managed_identity_resource_id: str
     """
 
     _validation = {
@@ -76,9 +177,14 @@ class RoleAssignment(Model):
         'description': {'key': 'properties.description', 'type': 'str'},
         'condition': {'key': 'properties.condition', 'type': 'str'},
         'condition_version': {'key': 'properties.conditionVersion', 'type': 'str'},
+        'created_on': {'key': 'properties.createdOn', 'type': 'iso-8601'},
+        'updated_on': {'key': 'properties.updatedOn', 'type': 'iso-8601'},
+        'created_by': {'key': 'properties.createdBy', 'type': 'str'},
+        'updated_by': {'key': 'properties.updatedBy', 'type': 'str'},
+        'delegated_managed_identity_resource_id': {'key': 'properties.delegatedManagedIdentityResourceId', 'type': 'str'},
     }
 
-    def __init__(self, *, scope: str=None, role_definition_id: str=None, principal_id: str=None, principal_type=None, can_delegate: bool=None, description: str=None, condition: str=None, condition_version: str=None, **kwargs) -> None:
+    def __init__(self, *, scope: str=None, role_definition_id: str=None, principal_id: str=None, principal_type=None, can_delegate: bool=None, description: str=None, condition: str=None, condition_version: str=None, created_on=None, updated_on=None, created_by: str=None, updated_by: str=None, delegated_managed_identity_resource_id: str=None, **kwargs) -> None:
         super(RoleAssignment, self).__init__(**kwargs)
         self.id = None
         self.name = None
@@ -91,6 +197,11 @@ def __init__(self, *, scope: str=None, role_definition_id: str=None, principal_i
         self.description = description
         self.condition = condition
         self.condition_version = condition_version
+        self.created_on = created_on
+        self.updated_on = updated_on
+        self.created_by = created_by
+        self.updated_by = updated_by
+        self.delegated_managed_identity_resource_id = delegated_managed_identity_resource_id
 
 
 class RoleAssignmentCreateParameters(Model):
@@ -116,9 +227,13 @@ class RoleAssignmentCreateParameters(Model):
     :type can_delegate: bool
     :param description: Description of role assignment
     :type description: str
-    :param condition: The conditions on the role assignment
+    :param condition: The conditions on the role assignment. This limits the
+     resources it can be assigned to. e.g.:
+     @Resource[Microsoft.Storage/storageAccounts/blobServices/containers:ContainerName]
+     StringEqualsIgnoreCase 'foo_storage_container'
     :type condition: str
-    :param condition_version: Version of the condition
+    :param condition_version: Version of the condition. Currently accepted
+     value is '2.0'
     :type condition_version: str
     """
 
diff --git a/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2020_04_01_preview/operations/_role_assignments_operations.py b/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2020_04_01_preview/operations/_role_assignments_operations.py
index 2fe33743dac89..7e3838a918639 100644
--- a/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2020_04_01_preview/operations/_role_assignments_operations.py
+++ b/sdk/authorization/azure-mgmt-authorization/azure/mgmt/authorization/v2020_04_01_preview/operations/_role_assignments_operations.py
@@ -148,7 +148,8 @@ def list_for_resource_group(
         :return: An iterator like instance of RoleAssignment
         :rtype:
          ~azure.mgmt.authorization.v2020_04_01_preview.models.RoleAssignmentPaged[~azure.mgmt.authorization.v2020_04_01_preview.models.RoleAssignment]
-        :raises: :class:`CloudError<msrestazure.azure_exceptions.CloudError>`
+        :raises:
+         :class:`ErrorResponseException<azure.mgmt.authorization.v2020_04_01_preview.models.ErrorResponseException>`
         """
         def prepare_request(next_link=None):
             if not next_link:
@@ -190,9 +191,7 @@ def internal_paging(next_link=None):
             response = self._client.send(request, stream=False, **operation_config)
 
             if response.status_code not in [200]:
-                exp = CloudError(response)
-                exp.request_id = response.headers.get('x-ms-request-id')
-                raise exp
+                raise models.ErrorResponseException(self._deserialize, response)
 
             return response
 
@@ -223,7 +222,8 @@ def delete(
         :rtype:
          ~azure.mgmt.authorization.v2020_04_01_preview.models.RoleAssignment or
          ~msrest.pipeline.ClientRawResponse
-        :raises: :class:`CloudError<msrestazure.azure_exceptions.CloudError>`
+        :raises:
+         :class:`ErrorResponseException<azure.mgmt.authorization.v2020_04_01_preview.models.ErrorResponseException>`
         """
         # Construct URL
         url = self.delete.metadata['url']
@@ -251,10 +251,8 @@ def delete(
         request = self._client.delete(url, query_parameters, header_parameters)
         response = self._client.send(request, stream=False, **operation_config)
 
-        if response.status_code not in [200]:
-            exp = CloudError(response)
-            exp.request_id = response.headers.get('x-ms-request-id')
-            raise exp
+        if response.status_code not in [200, 204]:
+            raise models.ErrorResponseException(self._deserialize, response)
 
         deserialized = None
         if response.status_code == 200:
@@ -294,7 +292,8 @@ def create(
         :rtype:
          ~azure.mgmt.authorization.v2020_04_01_preview.models.RoleAssignment or
          ~msrest.pipeline.ClientRawResponse
-        :raises: :class:`CloudError<msrestazure.azure_exceptions.CloudError>`
+        :raises:
+         :class:`ErrorResponseException<azure.mgmt.authorization.v2020_04_01_preview.models.ErrorResponseException>`
         """
         # Construct URL
         url = self.create.metadata['url']
@@ -327,9 +326,7 @@ def create(
         response = self._client.send(request, stream=False, **operation_config)
 
         if response.status_code not in [201]:
-            exp = CloudError(response)
-            exp.request_id = response.headers.get('x-ms-request-id')
-            raise exp
+            raise models.ErrorResponseException(self._deserialize, response)
 
         deserialized = None
         if response.status_code == 201:
@@ -359,7 +356,8 @@ def get(
         :rtype:
          ~azure.mgmt.authorization.v2020_04_01_preview.models.RoleAssignment or
          ~msrest.pipeline.ClientRawResponse
-        :raises: :class:`CloudError<msrestazure.azure_exceptions.CloudError>`
+        :raises:
+         :class:`ErrorResponseException<azure.mgmt.authorization.v2020_04_01_preview.models.ErrorResponseException>`
         """
         # Construct URL
         url = self.get.metadata['url']
@@ -388,9 +386,7 @@ def get(
         response = self._client.send(request, stream=False, **operation_config)
 
         if response.status_code not in [200]:
-            exp = CloudError(response)
-            exp.request_id = response.headers.get('x-ms-request-id')
-            raise exp
+            raise models.ErrorResponseException(self._deserialize, response)
 
         deserialized = None
         if response.status_code == 200:
@@ -601,7 +597,8 @@ def list(
         :return: An iterator like instance of RoleAssignment
         :rtype:
          ~azure.mgmt.authorization.v2020_04_01_preview.models.RoleAssignmentPaged[~azure.mgmt.authorization.v2020_04_01_preview.models.RoleAssignment]
-        :raises: :class:`CloudError<msrestazure.azure_exceptions.CloudError>`
+        :raises:
+         :class:`ErrorResponseException<azure.mgmt.authorization.v2020_04_01_preview.models.ErrorResponseException>`
         """
         def prepare_request(next_link=None):
             if not next_link:
@@ -642,9 +639,7 @@ def internal_paging(next_link=None):
             response = self._client.send(request, stream=False, **operation_config)
 
             if response.status_code not in [200]:
-                exp = CloudError(response)
-                exp.request_id = response.headers.get('x-ms-request-id')
-                raise exp
+                raise models.ErrorResponseException(self._deserialize, response)
 
             return response
 
@@ -676,7 +671,8 @@ def list_for_scope(
         :return: An iterator like instance of RoleAssignment
         :rtype:
          ~azure.mgmt.authorization.v2020_04_01_preview.models.RoleAssignmentPaged[~azure.mgmt.authorization.v2020_04_01_preview.models.RoleAssignment]
-        :raises: :class:`CloudError<msrestazure.azure_exceptions.CloudError>`
+        :raises:
+         :class:`ErrorResponseException<azure.mgmt.authorization.v2020_04_01_preview.models.ErrorResponseException>`
         """
         def prepare_request(next_link=None):
             if not next_link:
@@ -717,9 +713,7 @@ def internal_paging(next_link=None):
             response = self._client.send(request, stream=False, **operation_config)
 
             if response.status_code not in [200]:
-                exp = CloudError(response)
-                exp.request_id = response.headers.get('x-ms-request-id')
-                raise exp
+                raise models.ErrorResponseException(self._deserialize, response)
 
             return response