diff --git a/services/preview/storage/mgmt/2018-03-01-preview/storage/accounts.go b/services/preview/storage/mgmt/2018-03-01-preview/storage/accounts.go
index 5b751060226b..20504fdfeaa3 100644
--- a/services/preview/storage/mgmt/2018-03-01-preview/storage/accounts.go
+++ b/services/preview/storage/mgmt/2018-03-01-preview/storage/accounts.go
@@ -36,7 +36,8 @@ func NewAccountsClient(subscriptionID string) AccountsClient {
 	return NewAccountsClientWithBaseURI(DefaultBaseURI, subscriptionID)
 }
 
-// NewAccountsClientWithBaseURI creates an instance of the AccountsClient client.
+// NewAccountsClientWithBaseURI creates an instance of the AccountsClient client using a custom endpoint.  Use this
+// when interacting with an Azure cloud that uses a non-standard base URI (sovereign clouds, Azure stack).
 func NewAccountsClientWithBaseURI(baseURI string, subscriptionID string) AccountsClient {
 	return AccountsClient{NewWithBaseURI(baseURI, subscriptionID)}
 }
diff --git a/services/preview/storage/mgmt/2018-03-01-preview/storage/blobcontainers.go b/services/preview/storage/mgmt/2018-03-01-preview/storage/blobcontainers.go
index 7d6a2716d2b6..87236cb4e443 100644
--- a/services/preview/storage/mgmt/2018-03-01-preview/storage/blobcontainers.go
+++ b/services/preview/storage/mgmt/2018-03-01-preview/storage/blobcontainers.go
@@ -36,7 +36,8 @@ func NewBlobContainersClient(subscriptionID string) BlobContainersClient {
 	return NewBlobContainersClientWithBaseURI(DefaultBaseURI, subscriptionID)
 }
 
-// NewBlobContainersClientWithBaseURI creates an instance of the BlobContainersClient client.
+// NewBlobContainersClientWithBaseURI creates an instance of the BlobContainersClient client using a custom endpoint.
+// Use this when interacting with an Azure cloud that uses a non-standard base URI (sovereign clouds, Azure stack).
 func NewBlobContainersClientWithBaseURI(baseURI string, subscriptionID string) BlobContainersClient {
 	return BlobContainersClient{NewWithBaseURI(baseURI, subscriptionID)}
 }
diff --git a/services/preview/storage/mgmt/2018-03-01-preview/storage/client.go b/services/preview/storage/mgmt/2018-03-01-preview/storage/client.go
index e3479249802f..e07c3fa66f8e 100644
--- a/services/preview/storage/mgmt/2018-03-01-preview/storage/client.go
+++ b/services/preview/storage/mgmt/2018-03-01-preview/storage/client.go
@@ -41,7 +41,8 @@ func New(subscriptionID string) BaseClient {
 	return NewWithBaseURI(DefaultBaseURI, subscriptionID)
 }
 
-// NewWithBaseURI creates an instance of the BaseClient client.
+// NewWithBaseURI creates an instance of the BaseClient client using a custom endpoint.  Use this when interacting with
+// an Azure cloud that uses a non-standard base URI (sovereign clouds, Azure stack).
 func NewWithBaseURI(baseURI string, subscriptionID string) BaseClient {
 	return BaseClient{
 		Client:         autorest.NewClientWithUserAgent(UserAgent()),
diff --git a/services/preview/storage/mgmt/2018-03-01-preview/storage/operations.go b/services/preview/storage/mgmt/2018-03-01-preview/storage/operations.go
index 2ff4d401c29e..d75c490d9e68 100644
--- a/services/preview/storage/mgmt/2018-03-01-preview/storage/operations.go
+++ b/services/preview/storage/mgmt/2018-03-01-preview/storage/operations.go
@@ -35,7 +35,8 @@ func NewOperationsClient(subscriptionID string) OperationsClient {
 	return NewOperationsClientWithBaseURI(DefaultBaseURI, subscriptionID)
 }
 
-// NewOperationsClientWithBaseURI creates an instance of the OperationsClient client.
+// NewOperationsClientWithBaseURI creates an instance of the OperationsClient client using a custom endpoint.  Use this
+// when interacting with an Azure cloud that uses a non-standard base URI (sovereign clouds, Azure stack).
 func NewOperationsClientWithBaseURI(baseURI string, subscriptionID string) OperationsClient {
 	return OperationsClient{NewWithBaseURI(baseURI, subscriptionID)}
 }
diff --git a/services/preview/storage/mgmt/2018-03-01-preview/storage/skus.go b/services/preview/storage/mgmt/2018-03-01-preview/storage/skus.go
index 5a3bff8b8613..83b21ac70923 100644
--- a/services/preview/storage/mgmt/2018-03-01-preview/storage/skus.go
+++ b/services/preview/storage/mgmt/2018-03-01-preview/storage/skus.go
@@ -36,7 +36,8 @@ func NewSkusClient(subscriptionID string) SkusClient {
 	return NewSkusClientWithBaseURI(DefaultBaseURI, subscriptionID)
 }
 
-// NewSkusClientWithBaseURI creates an instance of the SkusClient client.
+// NewSkusClientWithBaseURI creates an instance of the SkusClient client using a custom endpoint.  Use this when
+// interacting with an Azure cloud that uses a non-standard base URI (sovereign clouds, Azure stack).
 func NewSkusClientWithBaseURI(baseURI string, subscriptionID string) SkusClient {
 	return SkusClient{NewWithBaseURI(baseURI, subscriptionID)}
 }
diff --git a/services/preview/storage/mgmt/2018-03-01-preview/storage/usages.go b/services/preview/storage/mgmt/2018-03-01-preview/storage/usages.go
index 2e50f1e53a0c..50f89ce43ed9 100644
--- a/services/preview/storage/mgmt/2018-03-01-preview/storage/usages.go
+++ b/services/preview/storage/mgmt/2018-03-01-preview/storage/usages.go
@@ -36,7 +36,8 @@ func NewUsagesClient(subscriptionID string) UsagesClient {
 	return NewUsagesClientWithBaseURI(DefaultBaseURI, subscriptionID)
 }
 
-// NewUsagesClientWithBaseURI creates an instance of the UsagesClient client.
+// NewUsagesClientWithBaseURI creates an instance of the UsagesClient client using a custom endpoint.  Use this when
+// interacting with an Azure cloud that uses a non-standard base URI (sovereign clouds, Azure stack).
 func NewUsagesClientWithBaseURI(baseURI string, subscriptionID string) UsagesClient {
 	return UsagesClient{NewWithBaseURI(baseURI, subscriptionID)}
 }