diff --git a/specification/securityinsights/resource-manager/Microsoft.SecurityInsights/preview/2019-01-01-preview/SecurityInsights.json b/specification/securityinsights/resource-manager/Microsoft.SecurityInsights/preview/2019-01-01-preview/SecurityInsights.json
index f506f28da02d..17abc447493b 100644
--- a/specification/securityinsights/resource-manager/Microsoft.SecurityInsights/preview/2019-01-01-preview/SecurityInsights.json
+++ b/specification/securityinsights/resource-manager/Microsoft.SecurityInsights/preview/2019-01-01-preview/SecurityInsights.json
@@ -1732,6 +1732,9 @@
           },
           "Get a Office ATP data connector": {
             "$ref": "./examples/dataConnectors/GetOffice365AdvancedThreatProtectionById.json"
+          },
+          "Get a Dynamics365 data connector": {
+            "$ref": "./examples/dataConnectors/GetDynamics365DataConnectorById.json"
           }
         },
         "tags": [
@@ -1778,6 +1781,9 @@
         "x-ms-examples": {
           "Creates or updates an Office365 data connector.": {
             "$ref": "./examples/dataConnectors/CreateOfficeDataConnetor.json"
+          },
+          "Creates or updates a Dynamics365 data connector.": {
+            "$ref": "./examples/dataConnectors/CreateDynamics365DataConnetor.json"
           }
         },
         "tags": [
@@ -1905,6 +1911,9 @@
           },
           "Check requirements for OfficeATP.": {
             "$ref": "./examples/dataConnectors/CheckRequirementsOfficeATP.json"
+          },
+          "Check requirements for Dynamics365.": {
+            "$ref": "./examples/dataConnectors/CheckRequirementsDynamics365.json"
           }
         },
         "tags": [
@@ -5880,7 +5889,8 @@
             "OfficeATP",
             "AmazonWebServicesCloudTrail",
             "AzureAdvancedThreatProtection",
-            "MicrosoftDefenderAdvancedThreatProtection"
+            "MicrosoftDefenderAdvancedThreatProtection",
+            "Dynamics365"
           ],
           "type": "string",
           "x-ms-enum": {
@@ -5916,6 +5926,9 @@
               },
               {
                 "value": "MicrosoftDefenderAdvancedThreatProtection"
+              },
+              {
+                "value": "Dynamics365"
               }
             ]
           }
@@ -6032,6 +6045,79 @@
       },
       "type": "object"
     },
+    "Dynamics365DataConnector": {
+      "allOf": [
+        {
+          "$ref": "#/definitions/DataConnector"
+        }
+      ],
+      "description": "Represents Dynamics365 data connector.",
+      "properties": {
+        "properties": {
+          "$ref": "#/definitions/Dynamics365DataConnectorProperties",
+          "description": "Dynamics365 data connector properties.",
+          "x-ms-client-flatten": true
+        }
+      },
+      "type": "object",
+      "x-ms-discriminator-value": "Dynamics365"
+    },
+    "Dynamics365DataConnectorDataTypes": {
+      "description": "The available data types for Dynamics365 data connector.",
+      "properties": {
+        "dynamics365CdsActivities": {
+          "allOf": [
+            {
+              "$ref": "#/definitions/DataConnectorDataTypeCommon"
+            }
+          ],
+          "description": "Common Data Service data type connection.",
+          "type": "object"
+        }
+      },
+      "type": "object"
+    },
+    "Dynamics365DataConnectorProperties": {
+      "allOf": [
+        {
+          "$ref": "#/definitions/DataConnectorTenantId"
+        }
+      ],
+      "description": "Dynamics365 data connector properties.",
+      "properties": {
+        "dataTypes": {
+          "$ref": "#/definitions/Dynamics365DataConnectorDataTypes",
+          "description": "The available data types for the connector."
+        }
+      },
+      "type": "object"
+    },
+    "Dynamics365CheckRequirements": {
+      "allOf": [
+        {
+          "$ref": "#/definitions/DataConnectorsCheckRequirements"
+        }
+      ],
+      "description": "Represents Dynamics365 requirements check request.",
+      "properties": {
+        "properties": {
+          "$ref": "#/definitions/Dynamics365CheckRequirementsProperties",
+          "description": "Dynamics365 requirements check properties.",
+          "x-ms-client-flatten": true
+        }
+      },
+      "type": "object",
+      "x-ms-discriminator-value": "Dynamics365"
+    },
+    "Dynamics365CheckRequirementsProperties": {
+      "allOf": [
+        {
+          "$ref": "#/definitions/DataConnectorTenantId"
+        }
+      ],
+      "description": "Dynamics365 requirements check properties.",
+      "type": "object"
+    },
     "Entity": {
       "allOf": [
         {
diff --git a/specification/securityinsights/resource-manager/Microsoft.SecurityInsights/preview/2019-01-01-preview/examples/dataConnectors/CheckRequirementsDynamics365.json b/specification/securityinsights/resource-manager/Microsoft.SecurityInsights/preview/2019-01-01-preview/examples/dataConnectors/CheckRequirementsDynamics365.json
new file mode 100644
index 000000000000..fbbe72c64327
--- /dev/null
+++ b/specification/securityinsights/resource-manager/Microsoft.SecurityInsights/preview/2019-01-01-preview/examples/dataConnectors/CheckRequirementsDynamics365.json
@@ -0,0 +1,23 @@
+{
+  "parameters": {
+    "api-version": "2019-01-01-preview",
+    "subscriptionId": "d0cfe6b2-9ac0-4464-9919-dccaee2e48c0",
+    "resourceGroupName": "myRg",
+    "workspaceName": "myWorkspace",
+    "operationalInsightsResourceProvider": "Microsoft.OperationalIinsights",
+    "DataConnectorsCheckRequirements": {
+      "kind": "Dynamics365",
+      "properties": {
+        "tenantId": "2070ecc9-b4d5-4ae4-adaa-936fa1954fa8"
+      }
+    }
+  },
+  "responses": {
+    "200": {
+      "body": {
+        "authorizationState": "Valid",
+        "licenseState": "Valid"
+      }
+    }
+  }
+}
diff --git a/specification/securityinsights/resource-manager/Microsoft.SecurityInsights/preview/2019-01-01-preview/examples/dataConnectors/CreateDynamics365DataConnetor.json b/specification/securityinsights/resource-manager/Microsoft.SecurityInsights/preview/2019-01-01-preview/examples/dataConnectors/CreateDynamics365DataConnetor.json
new file mode 100644
index 000000000000..0e6c38114ae9
--- /dev/null
+++ b/specification/securityinsights/resource-manager/Microsoft.SecurityInsights/preview/2019-01-01-preview/examples/dataConnectors/CreateDynamics365DataConnetor.json
@@ -0,0 +1,58 @@
+{
+  "parameters": {
+    "api-version": "2019-01-01-preview",
+    "subscriptionId": "d0cfe6b2-9ac0-4464-9919-dccaee2e48c0",
+    "resourceGroupName": "myRg",
+    "workspaceName": "myWorkspace",
+    "operationalInsightsResourceProvider": "Microsoft.OperationalInsights",
+    "dataConnectorId": "c2541efb-c9a6-47fe-9501-87d1017d1512",
+    "dataConnector": {
+      "kind": "Dynamics365",
+      "etag": "\"0300bf09-0000-0000-0000-5c37296e0000\"",
+      "properties": {
+        "tenantId": "2070ecc9-b4d5-4ae4-adaa-936fa1954fa8",
+        "dataTypes": {
+          "dynamics365CdsActivities": {
+            "state": "Enabled"
+          }
+        }
+      }
+    }
+  },
+  "responses": {
+    "200": {
+      "body": {
+        "id": "/subscriptions/d0cfe6b2-9ac0-4464-9919-dccaee2e48c0/resourceGroups/myRg/providers/Microsoft.OperationalIinsights/workspaces/myWorkspace/providers/Microsoft.SecurityInsights/dataConnectors/73e01a99-5cd7-4139-a149-9f2736ff2ab5",
+        "name": "c2541efb-c9a6-47fe-9501-87d1017d1512",
+        "type": "Microsoft.SecurityInsights/dataConnectors",
+        "kind": "Dynamics365",
+        "etag": "\"0300bf09-0000-0000-0000-5c37296e0000\"",
+        "properties": {
+          "tenantId": "2070ecc9-b4d5-4ae4-adaa-936fa1954fa8",
+          "dataTypes": {
+            "dynamics365CdsActivities": {
+              "state": "Enabled"
+            }
+          }
+        }
+      }
+    },
+    "201": {
+      "body": {
+        "id": "/subscriptions/d0cfe6b2-9ac0-4464-9919-dccaee2e48c0/resourceGroups/myRg/providers/Microsoft.OperationalIinsights/workspaces/myWorkspace/providers/Microsoft.SecurityInsights/dataConnectors/73e01a99-5cd7-4139-a149-9f2736ff2ab5",
+        "name": "c2541efb-c9a6-47fe-9501-87d1017d1512",
+        "type": "Microsoft.SecurityInsights/dataConnectors",
+        "kind": "Dynamics365",
+        "etag": "\"0300bf09-0000-0000-0000-5c37296e0000\"",
+        "properties": {
+          "tenantId": "2070ecc9-b4d5-4ae4-adaa-936fa1954fa8",
+          "dataTypes": {
+            "dynamics365CdsActivities": {
+              "state": "Enabled"
+            }
+          }
+        }
+      }
+    }
+  }
+}
diff --git a/specification/securityinsights/resource-manager/Microsoft.SecurityInsights/preview/2019-01-01-preview/examples/dataConnectors/GetDataConnectors.json b/specification/securityinsights/resource-manager/Microsoft.SecurityInsights/preview/2019-01-01-preview/examples/dataConnectors/GetDataConnectors.json
index d5cc1b3077fc..6ac1af725510 100644
--- a/specification/securityinsights/resource-manager/Microsoft.SecurityInsights/preview/2019-01-01-preview/examples/dataConnectors/GetDataConnectors.json
+++ b/specification/securityinsights/resource-manager/Microsoft.SecurityInsights/preview/2019-01-01-preview/examples/dataConnectors/GetDataConnectors.json
@@ -171,6 +171,21 @@
                 }
               }
             }
+          },
+          {
+            "id": "/subscriptions/d0cfe6b2-9ac0-4464-9919-dccaee2e48c0/resourceGroups/myRg/providers/Microsoft.OperationalInsights/workspaces/myWorkspace/providers/Microsoft.SecurityInsights/dataConnectors/3d3e955e-33eb-401d-89a7-251c81ddd660",
+            "name": "c2541efb-c9a6-47fe-9501-87d1017d1512",
+            "type": "Microsoft.SecurityInsights/dataConnectors",
+            "kind": "Dynamics365",
+            "etag": "\"0300bf09-0000-0000-0000-5c37296e0000\"",
+            "properties": {
+              "tenantId": "2070ecc9-b4d5-4ae4-adaa-936fa1954fa8",
+              "dataTypes": {
+                "dynamics365CdsActivities": {
+                  "state": "Enabled"
+                }
+              }
+            }
           }
         ]
       }
diff --git a/specification/securityinsights/resource-manager/Microsoft.SecurityInsights/preview/2019-01-01-preview/examples/dataConnectors/GetDynamics365DataConnectorById.json b/specification/securityinsights/resource-manager/Microsoft.SecurityInsights/preview/2019-01-01-preview/examples/dataConnectors/GetDynamics365DataConnectorById.json
new file mode 100644
index 000000000000..e715758c3dc9
--- /dev/null
+++ b/specification/securityinsights/resource-manager/Microsoft.SecurityInsights/preview/2019-01-01-preview/examples/dataConnectors/GetDynamics365DataConnectorById.json
@@ -0,0 +1,29 @@
+{
+  "parameters": {
+    "api-version": "2019-01-01-preview",
+    "subscriptionId": "d0cfe6b2-9ac0-4464-9919-dccaee2e48c0",
+    "resourceGroupName": "myRg",
+    "workspaceName": "myWorkspace",
+    "operationalInsightsResourceProvider": "Microsoft.OperationalInsights",
+    "dataConnectorId": "c2541efb-c9a6-47fe-9501-87d1017d1512"
+  },
+  "responses": {
+    "200": {
+      "body": {
+        "id": "/subscriptions/d0cfe6b2-9ac0-4464-9919-dccaee2e48c0/resourceGroups/myRg/providers/Microsoft.OperationalInsights/workspaces/myWorkspace/providers/Microsoft.SecurityInsights/dataConnectors/3d3e955e-33eb-401d-89a7-251c81ddd660",
+        "name": "c2541efb-c9a6-47fe-9501-87d1017d1512",
+        "type": "Microsoft.SecurityInsights/dataConnectors",
+        "kind": "Dynamics365",
+        "etag": "\"0300bf09-0000-0000-0000-5c37296e0000\"",
+        "properties": {
+          "tenantId": "2070ecc9-b4d5-4ae4-adaa-936fa1954fa8",
+          "dataTypes": {
+            "dynamics365CdsActivities": {
+              "state": "Enabled"
+            }
+          }
+        }
+      }
+    }
+  }
+}