diff --git a/profiles/2017-03-09/network/mgmt/network/models.go b/profiles/2017-03-09/network/mgmt/network/models.go
index 896f18980ee8..e0088ddbb392 100644
--- a/profiles/2017-03-09/network/mgmt/network/models.go
+++ b/profiles/2017-03-09/network/mgmt/network/models.go
@@ -32,7 +32,6 @@ type ExpressRouteCircuitAuthorizationsClient = original.ExpressRouteCircuitAutho
 type ExpressRouteCircuitPeeringsClient = original.ExpressRouteCircuitPeeringsClient
 type ExpressRouteCircuitsClient = original.ExpressRouteCircuitsClient
 type ExpressRouteServiceProvidersClient = original.ExpressRouteServiceProvidersClient
-type InterfacesClient = original.InterfacesClient
 type LoadBalancersClient = original.LoadBalancersClient
 type LocalNetworkGatewaysClient = original.LocalNetworkGatewaysClient
 type ApplicationGatewayCookieBasedAffinity = original.ApplicationGatewayCookieBasedAffinity
@@ -513,12 +512,6 @@ func NewExpressRouteServiceProvidersClient(subscriptionID string) ExpressRouteSe
 func NewExpressRouteServiceProvidersClientWithBaseURI(baseURI string, subscriptionID string) ExpressRouteServiceProvidersClient {
 	return original.NewExpressRouteServiceProvidersClientWithBaseURI(baseURI, subscriptionID)
 }
-func NewInterfacesClient(subscriptionID string) InterfacesClient {
-	return original.NewInterfacesClient(subscriptionID)
-}
-func NewInterfacesClientWithBaseURI(baseURI string, subscriptionID string) InterfacesClient {
-	return original.NewInterfacesClientWithBaseURI(baseURI, subscriptionID)
-}
 func NewLoadBalancersClient(subscriptionID string) LoadBalancersClient {
 	return original.NewLoadBalancersClient(subscriptionID)
 }
diff --git a/profiles/latest/network/mgmt/network/models.go b/profiles/latest/network/mgmt/network/models.go
index 482345fc8e18..6762f83b585e 100644
--- a/profiles/latest/network/mgmt/network/models.go
+++ b/profiles/latest/network/mgmt/network/models.go
@@ -40,7 +40,6 @@ type ExpressRouteServiceProvidersClient = original.ExpressRouteServiceProvidersC
 type InboundNatRulesClient = original.InboundNatRulesClient
 type InterfaceIPConfigurationsClient = original.InterfaceIPConfigurationsClient
 type InterfaceLoadBalancersClient = original.InterfaceLoadBalancersClient
-type InterfacesClient = original.InterfacesClient
 type LoadBalancerBackendAddressPoolsClient = original.LoadBalancerBackendAddressPoolsClient
 type LoadBalancerFrontendIPConfigurationsClient = original.LoadBalancerFrontendIPConfigurationsClient
 type LoadBalancerLoadBalancingRulesClient = original.LoadBalancerLoadBalancingRulesClient
@@ -1180,12 +1179,6 @@ func NewInterfaceLoadBalancersClient(subscriptionID string) InterfaceLoadBalance
 func NewInterfaceLoadBalancersClientWithBaseURI(baseURI string, subscriptionID string) InterfaceLoadBalancersClient {
 	return original.NewInterfaceLoadBalancersClientWithBaseURI(baseURI, subscriptionID)
 }
-func NewInterfacesClient(subscriptionID string) InterfacesClient {
-	return original.NewInterfacesClient(subscriptionID)
-}
-func NewInterfacesClientWithBaseURI(baseURI string, subscriptionID string) InterfacesClient {
-	return original.NewInterfacesClientWithBaseURI(baseURI, subscriptionID)
-}
 func NewLoadBalancerBackendAddressPoolsClient(subscriptionID string) LoadBalancerBackendAddressPoolsClient {
 	return original.NewLoadBalancerBackendAddressPoolsClient(subscriptionID)
 }
diff --git a/profiles/preview/network/mgmt/network/models.go b/profiles/preview/network/mgmt/network/models.go
index f0a8c69de982..9e8622d8222e 100644
--- a/profiles/preview/network/mgmt/network/models.go
+++ b/profiles/preview/network/mgmt/network/models.go
@@ -55,7 +55,6 @@ type InboundNatRulesClient = original.InboundNatRulesClient
 type InterfaceEndpointsClient = original.InterfaceEndpointsClient
 type InterfaceIPConfigurationsClient = original.InterfaceIPConfigurationsClient
 type InterfaceLoadBalancersClient = original.InterfaceLoadBalancersClient
-type InterfacesClient = original.InterfacesClient
 type InterfaceTapConfigurationsClient = original.InterfaceTapConfigurationsClient
 type LoadBalancerBackendAddressPoolsClient = original.LoadBalancerBackendAddressPoolsClient
 type LoadBalancerFrontendIPConfigurationsClient = original.LoadBalancerFrontendIPConfigurationsClient
@@ -1765,12 +1764,6 @@ func NewInterfaceLoadBalancersClient(subscriptionID string) InterfaceLoadBalance
 func NewInterfaceLoadBalancersClientWithBaseURI(baseURI string, subscriptionID string) InterfaceLoadBalancersClient {
 	return original.NewInterfaceLoadBalancersClientWithBaseURI(baseURI, subscriptionID)
 }
-func NewInterfacesClient(subscriptionID string) InterfacesClient {
-	return original.NewInterfacesClient(subscriptionID)
-}
-func NewInterfacesClientWithBaseURI(baseURI string, subscriptionID string) InterfacesClient {
-	return original.NewInterfacesClientWithBaseURI(baseURI, subscriptionID)
-}
 func NewInterfaceTapConfigurationsClient(subscriptionID string) InterfaceTapConfigurationsClient {
 	return original.NewInterfaceTapConfigurationsClient(subscriptionID)
 }
diff --git a/profiles/preview/preview/hdinsight/mgmt/hdinsight/models.go b/profiles/preview/preview/hdinsight/mgmt/hdinsight/models.go
index 7049eced4e79..38445783a9f9 100644
--- a/profiles/preview/preview/hdinsight/mgmt/hdinsight/models.go
+++ b/profiles/preview/preview/hdinsight/mgmt/hdinsight/models.go
@@ -19,7 +19,11 @@
 
 package hdinsight
 
-import original "github.com/Azure/azure-sdk-for-go/services/preview/hdinsight/mgmt/2018-06-01-preview/hdinsight"
+import (
+	"context"
+
+	original "github.com/Azure/azure-sdk-for-go/services/preview/hdinsight/mgmt/2018-06-01-preview/hdinsight"
+)
 
 type ApplicationsClient = original.ApplicationsClient
 
@@ -56,6 +60,14 @@ const (
 	ActiveDirectory DirectoryType = original.ActiveDirectory
 )
 
+type JSONWebKeyEncryptionAlgorithm = original.JSONWebKeyEncryptionAlgorithm
+
+const (
+	RSA15      JSONWebKeyEncryptionAlgorithm = original.RSA15
+	RSAOAEP    JSONWebKeyEncryptionAlgorithm = original.RSAOAEP
+	RSAOAEP256 JSONWebKeyEncryptionAlgorithm = original.RSAOAEP256
+)
+
 type OSType = original.OSType
 
 const (
@@ -92,6 +104,7 @@ type Cluster = original.Cluster
 type ClusterCreateParametersExtended = original.ClusterCreateParametersExtended
 type ClusterCreateProperties = original.ClusterCreateProperties
 type ClusterDefinition = original.ClusterDefinition
+type ClusterDiskEncryptionParameters = original.ClusterDiskEncryptionParameters
 type ClusterGetProperties = original.ClusterGetProperties
 type ClusterIdentity = original.ClusterIdentity
 type ClusterIdentityUserAssignedIdentitiesValue = original.ClusterIdentityUserAssignedIdentitiesValue
@@ -108,10 +121,12 @@ type ClustersCreateFuture = original.ClustersCreateFuture
 type ClustersDeleteFuture = original.ClustersDeleteFuture
 type ClustersExecuteScriptActionsFuture = original.ClustersExecuteScriptActionsFuture
 type ClustersResizeFuture = original.ClustersResizeFuture
+type ClustersRotateDiskEncryptionKeyFuture = original.ClustersRotateDiskEncryptionKeyFuture
 type ComputeProfile = original.ComputeProfile
 type ConfigurationsUpdateFuture = original.ConfigurationsUpdateFuture
 type ConnectivityEndpoint = original.ConnectivityEndpoint
 type DataDisksGroups = original.DataDisksGroups
+type DiskEncryptionProperties = original.DiskEncryptionProperties
 type ErrorResponse = original.ErrorResponse
 type Errors = original.Errors
 type ExecuteScriptActionParameters = original.ExecuteScriptActionParameters
@@ -204,6 +219,9 @@ func PossibleClusterProvisioningStateValues() []ClusterProvisioningState {
 func PossibleDirectoryTypeValues() []DirectoryType {
 	return original.PossibleDirectoryTypeValues()
 }
+func PossibleJSONWebKeyEncryptionAlgorithmValues() []JSONWebKeyEncryptionAlgorithm {
+	return original.PossibleJSONWebKeyEncryptionAlgorithmValues()
+}
 func PossibleOSTypeValues() []OSType {
 	return original.PossibleOSTypeValues()
 }
@@ -213,6 +231,36 @@ func PossibleResourceIdentityTypeValues() []ResourceIdentityType {
 func PossibleTierValues() []Tier {
 	return original.PossibleTierValues()
 }
+func NewApplicationListResultIterator(page ApplicationListResultPage) ApplicationListResultIterator {
+	return original.NewApplicationListResultIterator(page)
+}
+func NewApplicationListResultPage(getNextPage func(context.Context, ApplicationListResult) (ApplicationListResult, error)) ApplicationListResultPage {
+	return original.NewApplicationListResultPage(getNextPage)
+}
+func NewClusterListResultIterator(page ClusterListResultPage) ClusterListResultIterator {
+	return original.NewClusterListResultIterator(page)
+}
+func NewClusterListResultPage(getNextPage func(context.Context, ClusterListResult) (ClusterListResult, error)) ClusterListResultPage {
+	return original.NewClusterListResultPage(getNextPage)
+}
+func NewOperationListResultIterator(page OperationListResultPage) OperationListResultIterator {
+	return original.NewOperationListResultIterator(page)
+}
+func NewOperationListResultPage(getNextPage func(context.Context, OperationListResult) (OperationListResult, error)) OperationListResultPage {
+	return original.NewOperationListResultPage(getNextPage)
+}
+func NewScriptActionExecutionHistoryListIterator(page ScriptActionExecutionHistoryListPage) ScriptActionExecutionHistoryListIterator {
+	return original.NewScriptActionExecutionHistoryListIterator(page)
+}
+func NewScriptActionExecutionHistoryListPage(getNextPage func(context.Context, ScriptActionExecutionHistoryList) (ScriptActionExecutionHistoryList, error)) ScriptActionExecutionHistoryListPage {
+	return original.NewScriptActionExecutionHistoryListPage(getNextPage)
+}
+func NewScriptActionsListIterator(page ScriptActionsListPage) ScriptActionsListIterator {
+	return original.NewScriptActionsListIterator(page)
+}
+func NewScriptActionsListPage(getNextPage func(context.Context, ScriptActionsList) (ScriptActionsList, error)) ScriptActionsListPage {
+	return original.NewScriptActionsListPage(getNextPage)
+}
 func NewOperationsClient(subscriptionID string) OperationsClient {
 	return original.NewOperationsClient(subscriptionID)
 }
diff --git a/profiles/preview/preview/network/mgmt/network/models.go b/profiles/preview/preview/network/mgmt/network/models.go
index a3ecb2be065b..53406eeb1fc5 100644
--- a/profiles/preview/preview/network/mgmt/network/models.go
+++ b/profiles/preview/preview/network/mgmt/network/models.go
@@ -32,7 +32,6 @@ type ExpressRouteCircuitAuthorizationsClient = original.ExpressRouteCircuitAutho
 type ExpressRouteCircuitPeeringsClient = original.ExpressRouteCircuitPeeringsClient
 type ExpressRouteCircuitsClient = original.ExpressRouteCircuitsClient
 type ExpressRouteServiceProvidersClient = original.ExpressRouteServiceProvidersClient
-type InterfacesClient = original.InterfacesClient
 type LoadBalancersClient = original.LoadBalancersClient
 type LocalNetworkGatewaysClient = original.LocalNetworkGatewaysClient
 type ApplicationGatewayCookieBasedAffinity = original.ApplicationGatewayCookieBasedAffinity
@@ -471,12 +470,6 @@ func NewExpressRouteServiceProvidersClient(subscriptionID string) ExpressRouteSe
 func NewExpressRouteServiceProvidersClientWithBaseURI(baseURI string, subscriptionID string) ExpressRouteServiceProvidersClient {
 	return original.NewExpressRouteServiceProvidersClientWithBaseURI(baseURI, subscriptionID)
 }
-func NewInterfacesClient(subscriptionID string) InterfacesClient {
-	return original.NewInterfacesClient(subscriptionID)
-}
-func NewInterfacesClientWithBaseURI(baseURI string, subscriptionID string) InterfacesClient {
-	return original.NewInterfacesClientWithBaseURI(baseURI, subscriptionID)
-}
 func NewLoadBalancersClient(subscriptionID string) LoadBalancersClient {
 	return original.NewLoadBalancersClient(subscriptionID)
 }
diff --git a/services/preview/hdinsight/mgmt/2015-03-01-preview/hdinsight/clusters.go b/services/preview/hdinsight/mgmt/2015-03-01-preview/hdinsight/clusters.go
index 686524b80b08..a3b08e734ed4 100644
--- a/services/preview/hdinsight/mgmt/2015-03-01-preview/hdinsight/clusters.go
+++ b/services/preview/hdinsight/mgmt/2015-03-01-preview/hdinsight/clusters.go
@@ -662,6 +662,85 @@ func (client ClustersClient) ResizeResponder(resp *http.Response) (result autore
 	return
 }
 
+// RotateDiskEncryptionKey rotate disk encryption key of the specified HDInsight cluster.
+// Parameters:
+// resourceGroupName - the name of the resource group.
+// clusterName - the name of the cluster.
+// parameters - the parameters for the disk encryption operation.
+func (client ClustersClient) RotateDiskEncryptionKey(ctx context.Context, resourceGroupName string, clusterName string, parameters ClusterDiskEncryptionParameters) (result ClustersRotateDiskEncryptionKeyFuture, err error) {
+	if tracing.IsEnabled() {
+		ctx = tracing.StartSpan(ctx, fqdn+"/ClustersClient.RotateDiskEncryptionKey")
+		defer func() {
+			sc := -1
+			if result.Response() != nil {
+				sc = result.Response().StatusCode
+			}
+			tracing.EndSpan(ctx, sc, err)
+		}()
+	}
+	req, err := client.RotateDiskEncryptionKeyPreparer(ctx, resourceGroupName, clusterName, parameters)
+	if err != nil {
+		err = autorest.NewErrorWithError(err, "hdinsight.ClustersClient", "RotateDiskEncryptionKey", nil, "Failure preparing request")
+		return
+	}
+
+	result, err = client.RotateDiskEncryptionKeySender(req)
+	if err != nil {
+		err = autorest.NewErrorWithError(err, "hdinsight.ClustersClient", "RotateDiskEncryptionKey", result.Response(), "Failure sending request")
+		return
+	}
+
+	return
+}
+
+// RotateDiskEncryptionKeyPreparer prepares the RotateDiskEncryptionKey request.
+func (client ClustersClient) RotateDiskEncryptionKeyPreparer(ctx context.Context, resourceGroupName string, clusterName string, parameters ClusterDiskEncryptionParameters) (*http.Request, error) {
+	pathParameters := map[string]interface{}{
+		"clusterName":       autorest.Encode("path", clusterName),
+		"resourceGroupName": autorest.Encode("path", resourceGroupName),
+		"subscriptionId":    autorest.Encode("path", client.SubscriptionID),
+	}
+
+	const APIVersion = "2015-03-01-preview"
+	queryParameters := map[string]interface{}{
+		"api-version": APIVersion,
+	}
+
+	preparer := autorest.CreatePreparer(
+		autorest.AsContentType("application/json; charset=utf-8"),
+		autorest.AsPost(),
+		autorest.WithBaseURL(client.BaseURI),
+		autorest.WithPathParameters("/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.HDInsight/clusters/{clusterName}/rotatediskencryptionkey", pathParameters),
+		autorest.WithJSON(parameters),
+		autorest.WithQueryParameters(queryParameters))
+	return preparer.Prepare((&http.Request{}).WithContext(ctx))
+}
+
+// RotateDiskEncryptionKeySender sends the RotateDiskEncryptionKey request. The method will close the
+// http.Response Body if it receives an error.
+func (client ClustersClient) RotateDiskEncryptionKeySender(req *http.Request) (future ClustersRotateDiskEncryptionKeyFuture, err error) {
+	var resp *http.Response
+	resp, err = autorest.SendWithSender(client, req,
+		azure.DoRetryWithRegistration(client.Client))
+	if err != nil {
+		return
+	}
+	future.Future, err = azure.NewFutureFromResponse(resp)
+	return
+}
+
+// RotateDiskEncryptionKeyResponder handles the response to the RotateDiskEncryptionKey request. The method always
+// closes the http.Response Body.
+func (client ClustersClient) RotateDiskEncryptionKeyResponder(resp *http.Response) (result autorest.Response, err error) {
+	err = autorest.Respond(
+		resp,
+		client.ByInspecting(),
+		azure.WithErrorUnlessStatusCode(http.StatusOK, http.StatusAccepted),
+		autorest.ByClosing())
+	result.Response = resp
+	return
+}
+
 // Update patch HDInsight cluster with the specified parameters.
 // Parameters:
 // resourceGroupName - the name of the resource group.
diff --git a/services/preview/hdinsight/mgmt/2015-03-01-preview/hdinsight/hdinsightapi/interfaces.go b/services/preview/hdinsight/mgmt/2015-03-01-preview/hdinsight/hdinsightapi/interfaces.go
new file mode 100644
index 000000000000..228de4c10c97
--- /dev/null
+++ b/services/preview/hdinsight/mgmt/2015-03-01-preview/hdinsight/hdinsightapi/interfaces.go
@@ -0,0 +1,101 @@
+package hdinsightapi
+
+// Copyright (c) Microsoft and contributors.  All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// Code generated by Microsoft (R) AutoRest Code Generator.
+// Changes may cause incorrect behavior and will be lost if the code is regenerated.
+
+import (
+	"context"
+	"github.com/Azure/azure-sdk-for-go/services/preview/hdinsight/mgmt/2015-03-01-preview/hdinsight"
+	"github.com/Azure/go-autorest/autorest"
+)
+
+// ClustersClientAPI contains the set of methods on the ClustersClient type.
+type ClustersClientAPI interface {
+	Create(ctx context.Context, resourceGroupName string, clusterName string, parameters hdinsight.ClusterCreateParametersExtended) (result hdinsight.ClustersCreateFuture, err error)
+	Delete(ctx context.Context, resourceGroupName string, clusterName string) (result hdinsight.ClustersDeleteFuture, err error)
+	ExecuteScriptActions(ctx context.Context, resourceGroupName string, clusterName string, parameters hdinsight.ExecuteScriptActionParameters) (result hdinsight.ClustersExecuteScriptActionsFuture, err error)
+	Get(ctx context.Context, resourceGroupName string, clusterName string) (result hdinsight.Cluster, err error)
+	List(ctx context.Context) (result hdinsight.ClusterListResultPage, err error)
+	ListByResourceGroup(ctx context.Context, resourceGroupName string) (result hdinsight.ClusterListResultPage, err error)
+	Resize(ctx context.Context, resourceGroupName string, clusterName string, parameters hdinsight.ClusterResizeParameters) (result hdinsight.ClustersResizeFuture, err error)
+	RotateDiskEncryptionKey(ctx context.Context, resourceGroupName string, clusterName string, parameters hdinsight.ClusterDiskEncryptionParameters) (result hdinsight.ClustersRotateDiskEncryptionKeyFuture, err error)
+	Update(ctx context.Context, resourceGroupName string, clusterName string, parameters hdinsight.ClusterPatchParameters) (result hdinsight.Cluster, err error)
+}
+
+var _ ClustersClientAPI = (*hdinsight.ClustersClient)(nil)
+
+// ApplicationsClientAPI contains the set of methods on the ApplicationsClient type.
+type ApplicationsClientAPI interface {
+	Create(ctx context.Context, resourceGroupName string, clusterName string, applicationName string, parameters hdinsight.Application) (result hdinsight.ApplicationsCreateFuture, err error)
+	Delete(ctx context.Context, resourceGroupName string, clusterName string, applicationName string) (result hdinsight.ApplicationsDeleteFuture, err error)
+	Get(ctx context.Context, resourceGroupName string, clusterName string, applicationName string) (result hdinsight.Application, err error)
+	List(ctx context.Context, resourceGroupName string, clusterName string) (result hdinsight.ApplicationListResultPage, err error)
+}
+
+var _ ApplicationsClientAPI = (*hdinsight.ApplicationsClient)(nil)
+
+// LocationsClientAPI contains the set of methods on the LocationsClient type.
+type LocationsClientAPI interface {
+	GetCapabilities(ctx context.Context, location string) (result hdinsight.CapabilitiesResult, err error)
+	ListUsages(ctx context.Context, location string) (result hdinsight.UsagesListResult, err error)
+}
+
+var _ LocationsClientAPI = (*hdinsight.LocationsClient)(nil)
+
+// ConfigurationsClientAPI contains the set of methods on the ConfigurationsClient type.
+type ConfigurationsClientAPI interface {
+	Get(ctx context.Context, resourceGroupName string, clusterName string, configurationName string) (result hdinsight.SetString, err error)
+	UpdateHTTPSettings(ctx context.Context, resourceGroupName string, clusterName string, configurationName string, parameters map[string]*string) (result hdinsight.ConfigurationsUpdateHTTPSettingsFuture, err error)
+}
+
+var _ ConfigurationsClientAPI = (*hdinsight.ConfigurationsClient)(nil)
+
+// ExtensionClientAPI contains the set of methods on the ExtensionClient type.
+type ExtensionClientAPI interface {
+	Create(ctx context.Context, resourceGroupName string, clusterName string, extensionName string, parameters hdinsight.Extension) (result autorest.Response, err error)
+	Delete(ctx context.Context, resourceGroupName string, clusterName string, extensionName string) (result autorest.Response, err error)
+	DisableMonitoring(ctx context.Context, resourceGroupName string, clusterName string) (result hdinsight.ExtensionDisableMonitoringFuture, err error)
+	EnableMonitoring(ctx context.Context, resourceGroupName string, clusterName string, parameters hdinsight.ClusterMonitoringRequest) (result hdinsight.ExtensionEnableMonitoringFuture, err error)
+	Get(ctx context.Context, resourceGroupName string, clusterName string, extensionName string) (result hdinsight.Extension, err error)
+	GetMonitoringStatus(ctx context.Context, resourceGroupName string, clusterName string) (result hdinsight.ClusterMonitoringResponse, err error)
+}
+
+var _ ExtensionClientAPI = (*hdinsight.ExtensionClient)(nil)
+
+// ScriptActionsClientAPI contains the set of methods on the ScriptActionsClient type.
+type ScriptActionsClientAPI interface {
+	Delete(ctx context.Context, resourceGroupName string, clusterName string, scriptName string) (result autorest.Response, err error)
+	GetExecutionDetail(ctx context.Context, resourceGroupName string, clusterName string, scriptExecutionID string) (result hdinsight.RuntimeScriptActionDetail, err error)
+	ListPersistedScripts(ctx context.Context, resourceGroupName string, clusterName string) (result hdinsight.ScriptActionsListPage, err error)
+}
+
+var _ ScriptActionsClientAPI = (*hdinsight.ScriptActionsClient)(nil)
+
+// ScriptExecutionHistoryClientAPI contains the set of methods on the ScriptExecutionHistoryClient type.
+type ScriptExecutionHistoryClientAPI interface {
+	List(ctx context.Context, resourceGroupName string, clusterName string) (result hdinsight.ScriptActionExecutionHistoryListPage, err error)
+	Promote(ctx context.Context, resourceGroupName string, clusterName string, scriptExecutionID string) (result autorest.Response, err error)
+}
+
+var _ ScriptExecutionHistoryClientAPI = (*hdinsight.ScriptExecutionHistoryClient)(nil)
+
+// OperationsClientAPI contains the set of methods on the OperationsClient type.
+type OperationsClientAPI interface {
+	List(ctx context.Context) (result hdinsight.OperationListResultPage, err error)
+}
+
+var _ OperationsClientAPI = (*hdinsight.OperationsClient)(nil)
diff --git a/services/preview/hdinsight/mgmt/2015-03-01-preview/hdinsight/models.go b/services/preview/hdinsight/mgmt/2015-03-01-preview/hdinsight/models.go
index b19ea571ddd7..ec4333bd5ad5 100644
--- a/services/preview/hdinsight/mgmt/2015-03-01-preview/hdinsight/models.go
+++ b/services/preview/hdinsight/mgmt/2015-03-01-preview/hdinsight/models.go
@@ -81,6 +81,23 @@ func PossibleDirectoryTypeValues() []DirectoryType {
 	return []DirectoryType{ActiveDirectory}
 }
 
+// JSONWebKeyEncryptionAlgorithm enumerates the values for json web key encryption algorithm.
+type JSONWebKeyEncryptionAlgorithm string
+
+const (
+	// RSA15 ...
+	RSA15 JSONWebKeyEncryptionAlgorithm = "RSA1_5"
+	// RSAOAEP ...
+	RSAOAEP JSONWebKeyEncryptionAlgorithm = "RSA-OAEP"
+	// RSAOAEP256 ...
+	RSAOAEP256 JSONWebKeyEncryptionAlgorithm = "RSA-OAEP-256"
+)
+
+// PossibleJSONWebKeyEncryptionAlgorithmValues returns an array of possible values for the JSONWebKeyEncryptionAlgorithm const type.
+func PossibleJSONWebKeyEncryptionAlgorithmValues() []JSONWebKeyEncryptionAlgorithm {
+	return []JSONWebKeyEncryptionAlgorithm{RSA15, RSAOAEP, RSAOAEP256}
+}
+
 // OSType enumerates the values for os type.
 type OSType string
 
@@ -261,6 +278,11 @@ func (iter ApplicationListResultIterator) Value() Application {
 	return iter.page.Values()[iter.i]
 }
 
+// Creates a new instance of the ApplicationListResultIterator type.
+func NewApplicationListResultIterator(page ApplicationListResultPage) ApplicationListResultIterator {
+	return ApplicationListResultIterator{page: page}
+}
+
 // IsEmpty returns true if the ListResult contains no values.
 func (alr ApplicationListResult) IsEmpty() bool {
 	return alr.Value == nil || len(*alr.Value) == 0
@@ -330,6 +352,11 @@ func (page ApplicationListResultPage) Values() []Application {
 	return *page.alr.Value
 }
 
+// Creates a new instance of the ApplicationListResultPage type.
+func NewApplicationListResultPage(getNextPage func(context.Context, ApplicationListResult) (ApplicationListResult, error)) ApplicationListResultPage {
+	return ApplicationListResultPage{fn: getNextPage}
+}
+
 // ApplicationProperties the HDInsight cluster application GET response.
 type ApplicationProperties struct {
 	// ComputeProfile - The list of roles in the cluster.
@@ -546,6 +573,8 @@ type ClusterCreateProperties struct {
 	ComputeProfile *ComputeProfile `json:"computeProfile,omitempty"`
 	// StorageProfile - The storage profile.
 	StorageProfile *StorageProfile `json:"storageProfile,omitempty"`
+	// DiskEncryptionProperties - The disk encryption properties.
+	DiskEncryptionProperties *DiskEncryptionProperties `json:"diskEncryptionProperties,omitempty"`
 }
 
 // ClusterDefinition the cluster definition.
@@ -578,6 +607,16 @@ func (cd ClusterDefinition) MarshalJSON() ([]byte, error) {
 	return json.Marshal(objectMap)
 }
 
+// ClusterDiskEncryptionParameters the Disk Encryption Cluster request parameters.
+type ClusterDiskEncryptionParameters struct {
+	// VaultURI - Base key vault URI where the customers key is located eg. https://myvault.vault.azure.net
+	VaultURI *string `json:"vaultUri,omitempty"`
+	// KeyName - Key name that is used for enabling disk encryption.
+	KeyName *string `json:"keyName,omitempty"`
+	// KeyVersion - Specific key version that is used for enabling disk encryption.
+	KeyVersion *string `json:"keyVersion,omitempty"`
+}
+
 // ClusterGetProperties the properties of cluster.
 type ClusterGetProperties struct {
 	// ClusterVersion - The version of the cluster.
@@ -604,6 +643,8 @@ type ClusterGetProperties struct {
 	Errors *[]Errors `json:"errors,omitempty"`
 	// ConnectivityEndpoints - The list of connectivity endpoints.
 	ConnectivityEndpoints *[]ConnectivityEndpoint `json:"connectivityEndpoints,omitempty"`
+	// DiskEncryptionProperties - The disk encryption properties.
+	DiskEncryptionProperties *DiskEncryptionProperties `json:"diskEncryptionProperties,omitempty"`
 }
 
 // ClusterIdentity identity for the cluster.
@@ -719,6 +760,11 @@ func (iter ClusterListResultIterator) Value() Cluster {
 	return iter.page.Values()[iter.i]
 }
 
+// Creates a new instance of the ClusterListResultIterator type.
+func NewClusterListResultIterator(page ClusterListResultPage) ClusterListResultIterator {
+	return ClusterListResultIterator{page: page}
+}
+
 // IsEmpty returns true if the ListResult contains no values.
 func (clr ClusterListResult) IsEmpty() bool {
 	return clr.Value == nil || len(*clr.Value) == 0
@@ -788,6 +834,11 @@ func (page ClusterListResultPage) Values() []Cluster {
 	return *page.clr.Value
 }
 
+// Creates a new instance of the ClusterListResultPage type.
+func NewClusterListResultPage(getNextPage func(context.Context, ClusterListResult) (ClusterListResult, error)) ClusterListResultPage {
+	return ClusterListResultPage{fn: getNextPage}
+}
+
 // ClusterListRuntimeScriptActionDetailResult the list runtime script action detail response.
 type ClusterListRuntimeScriptActionDetailResult struct {
 	// Value - The list of persisted script action details for the cluster.
@@ -932,6 +983,29 @@ func (future *ClustersResizeFuture) Result(client ClustersClient) (ar autorest.R
 	return
 }
 
+// ClustersRotateDiskEncryptionKeyFuture an abstraction for monitoring and retrieving the results of a
+// long-running operation.
+type ClustersRotateDiskEncryptionKeyFuture struct {
+	azure.Future
+}
+
+// Result returns the result of the asynchronous operation.
+// If the operation has not completed it will return an error.
+func (future *ClustersRotateDiskEncryptionKeyFuture) Result(client ClustersClient) (ar autorest.Response, err error) {
+	var done bool
+	done, err = future.Done(client)
+	if err != nil {
+		err = autorest.NewErrorWithError(err, "hdinsight.ClustersRotateDiskEncryptionKeyFuture", "Result", future.Response(), "Polling failure")
+		return
+	}
+	if !done {
+		err = azure.NewAsyncOpIncompleteError("hdinsight.ClustersRotateDiskEncryptionKeyFuture")
+		return
+	}
+	ar.Response = future.Response()
+	return
+}
+
 // ComputeProfile describes the compute profile.
 type ComputeProfile struct {
 	// Roles - The list of roles in the cluster.
@@ -983,6 +1057,20 @@ type DataDisksGroups struct {
 	DiskSizeGB *int32 `json:"diskSizeGB,omitempty"`
 }
 
+// DiskEncryptionProperties the disk encryption properties
+type DiskEncryptionProperties struct {
+	// VaultURI - Base key vault URI where the customers key is located eg. https://myvault.vault.azure.net
+	VaultURI *string `json:"vaultUri,omitempty"`
+	// KeyName - Key name that is used for enabling disk encryption.
+	KeyName *string `json:"keyName,omitempty"`
+	// KeyVersion - Specific key version that is used for enabling disk encryption.
+	KeyVersion *string `json:"keyVersion,omitempty"`
+	// EncryptionAlgorithm - Algorithm identifier for encryption, default RSA-OAEP. Possible values include: 'RSAOAEP', 'RSAOAEP256', 'RSA15'
+	EncryptionAlgorithm JSONWebKeyEncryptionAlgorithm `json:"encryptionAlgorithm,omitempty"`
+	// MsiResourceID - Resource ID of Managed Identity that is used to access the key vault.
+	MsiResourceID *string `json:"msiResourceId,omitempty"`
+}
+
 // ErrorResponse describes the format of Error response.
 type ErrorResponse struct {
 	// Code - Error code
@@ -1172,6 +1260,11 @@ func (iter OperationListResultIterator) Value() Operation {
 	return iter.page.Values()[iter.i]
 }
 
+// Creates a new instance of the OperationListResultIterator type.
+func NewOperationListResultIterator(page OperationListResultPage) OperationListResultIterator {
+	return OperationListResultIterator{page: page}
+}
+
 // IsEmpty returns true if the ListResult contains no values.
 func (olr OperationListResult) IsEmpty() bool {
 	return olr.Value == nil || len(*olr.Value) == 0
@@ -1241,6 +1334,11 @@ func (page OperationListResultPage) Values() []Operation {
 	return *page.olr.Value
 }
 
+// Creates a new instance of the OperationListResultPage type.
+func NewOperationListResultPage(getNextPage func(context.Context, OperationListResult) (OperationListResult, error)) OperationListResultPage {
+	return OperationListResultPage{fn: getNextPage}
+}
+
 // OperationResource the azure async operation response.
 type OperationResource struct {
 	// Status - The async operation state. Possible values include: 'InProgress', 'Succeeded', 'Failed'
@@ -1445,6 +1543,11 @@ func (iter ScriptActionExecutionHistoryListIterator) Value() RuntimeScriptAction
 	return iter.page.Values()[iter.i]
 }
 
+// Creates a new instance of the ScriptActionExecutionHistoryListIterator type.
+func NewScriptActionExecutionHistoryListIterator(page ScriptActionExecutionHistoryListPage) ScriptActionExecutionHistoryListIterator {
+	return ScriptActionExecutionHistoryListIterator{page: page}
+}
+
 // IsEmpty returns true if the ListResult contains no values.
 func (saehl ScriptActionExecutionHistoryList) IsEmpty() bool {
 	return saehl.Value == nil || len(*saehl.Value) == 0
@@ -1514,6 +1617,11 @@ func (page ScriptActionExecutionHistoryListPage) Values() []RuntimeScriptActionD
 	return *page.saehl.Value
 }
 
+// Creates a new instance of the ScriptActionExecutionHistoryListPage type.
+func NewScriptActionExecutionHistoryListPage(getNextPage func(context.Context, ScriptActionExecutionHistoryList) (ScriptActionExecutionHistoryList, error)) ScriptActionExecutionHistoryListPage {
+	return ScriptActionExecutionHistoryListPage{fn: getNextPage}
+}
+
 // ScriptActionExecutionSummary the execution summary of a script action.
 type ScriptActionExecutionSummary struct {
 	// Status - The status of script action execution.
@@ -1603,6 +1711,11 @@ func (iter ScriptActionsListIterator) Value() RuntimeScriptActionDetail {
 	return iter.page.Values()[iter.i]
 }
 
+// Creates a new instance of the ScriptActionsListIterator type.
+func NewScriptActionsListIterator(page ScriptActionsListPage) ScriptActionsListIterator {
+	return ScriptActionsListIterator{page: page}
+}
+
 // IsEmpty returns true if the ListResult contains no values.
 func (sal ScriptActionsList) IsEmpty() bool {
 	return sal.Value == nil || len(*sal.Value) == 0
@@ -1672,6 +1785,11 @@ func (page ScriptActionsListPage) Values() []RuntimeScriptActionDetail {
 	return *page.sal.Value
 }
 
+// Creates a new instance of the ScriptActionsListPage type.
+func NewScriptActionsListPage(getNextPage func(context.Context, ScriptActionsList) (ScriptActionsList, error)) ScriptActionsListPage {
+	return ScriptActionsListPage{fn: getNextPage}
+}
+
 // SecurityProfile the security profile which contains Ssh public key for the HDInsight cluster.
 type SecurityProfile struct {
 	// DirectoryType - The directory type. Possible values include: 'ActiveDirectory'
diff --git a/services/preview/hdinsight/mgmt/2018-06-01-preview/hdinsight/clusters.go b/services/preview/hdinsight/mgmt/2018-06-01-preview/hdinsight/clusters.go
index 9ee73164311a..c3f244287d7a 100644
--- a/services/preview/hdinsight/mgmt/2018-06-01-preview/hdinsight/clusters.go
+++ b/services/preview/hdinsight/mgmt/2018-06-01-preview/hdinsight/clusters.go
@@ -662,6 +662,85 @@ func (client ClustersClient) ResizeResponder(resp *http.Response) (result autore
 	return
 }
 
+// RotateDiskEncryptionKey rotate disk encryption key of the specified HDInsight cluster.
+// Parameters:
+// resourceGroupName - the name of the resource group.
+// clusterName - the name of the cluster.
+// parameters - the parameters for the disk encryption operation.
+func (client ClustersClient) RotateDiskEncryptionKey(ctx context.Context, resourceGroupName string, clusterName string, parameters ClusterDiskEncryptionParameters) (result ClustersRotateDiskEncryptionKeyFuture, err error) {
+	if tracing.IsEnabled() {
+		ctx = tracing.StartSpan(ctx, fqdn+"/ClustersClient.RotateDiskEncryptionKey")
+		defer func() {
+			sc := -1
+			if result.Response() != nil {
+				sc = result.Response().StatusCode
+			}
+			tracing.EndSpan(ctx, sc, err)
+		}()
+	}
+	req, err := client.RotateDiskEncryptionKeyPreparer(ctx, resourceGroupName, clusterName, parameters)
+	if err != nil {
+		err = autorest.NewErrorWithError(err, "hdinsight.ClustersClient", "RotateDiskEncryptionKey", nil, "Failure preparing request")
+		return
+	}
+
+	result, err = client.RotateDiskEncryptionKeySender(req)
+	if err != nil {
+		err = autorest.NewErrorWithError(err, "hdinsight.ClustersClient", "RotateDiskEncryptionKey", result.Response(), "Failure sending request")
+		return
+	}
+
+	return
+}
+
+// RotateDiskEncryptionKeyPreparer prepares the RotateDiskEncryptionKey request.
+func (client ClustersClient) RotateDiskEncryptionKeyPreparer(ctx context.Context, resourceGroupName string, clusterName string, parameters ClusterDiskEncryptionParameters) (*http.Request, error) {
+	pathParameters := map[string]interface{}{
+		"clusterName":       autorest.Encode("path", clusterName),
+		"resourceGroupName": autorest.Encode("path", resourceGroupName),
+		"subscriptionId":    autorest.Encode("path", client.SubscriptionID),
+	}
+
+	const APIVersion = "2018-06-01-preview"
+	queryParameters := map[string]interface{}{
+		"api-version": APIVersion,
+	}
+
+	preparer := autorest.CreatePreparer(
+		autorest.AsContentType("application/json; charset=utf-8"),
+		autorest.AsPost(),
+		autorest.WithBaseURL(client.BaseURI),
+		autorest.WithPathParameters("/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.HDInsight/clusters/{clusterName}/rotatediskencryptionkey", pathParameters),
+		autorest.WithJSON(parameters),
+		autorest.WithQueryParameters(queryParameters))
+	return preparer.Prepare((&http.Request{}).WithContext(ctx))
+}
+
+// RotateDiskEncryptionKeySender sends the RotateDiskEncryptionKey request. The method will close the
+// http.Response Body if it receives an error.
+func (client ClustersClient) RotateDiskEncryptionKeySender(req *http.Request) (future ClustersRotateDiskEncryptionKeyFuture, err error) {
+	var resp *http.Response
+	resp, err = autorest.SendWithSender(client, req,
+		azure.DoRetryWithRegistration(client.Client))
+	if err != nil {
+		return
+	}
+	future.Future, err = azure.NewFutureFromResponse(resp)
+	return
+}
+
+// RotateDiskEncryptionKeyResponder handles the response to the RotateDiskEncryptionKey request. The method always
+// closes the http.Response Body.
+func (client ClustersClient) RotateDiskEncryptionKeyResponder(resp *http.Response) (result autorest.Response, err error) {
+	err = autorest.Respond(
+		resp,
+		client.ByInspecting(),
+		azure.WithErrorUnlessStatusCode(http.StatusOK, http.StatusAccepted),
+		autorest.ByClosing())
+	result.Response = resp
+	return
+}
+
 // Update patch HDInsight cluster with the specified parameters.
 // Parameters:
 // resourceGroupName - the name of the resource group.
diff --git a/services/preview/hdinsight/mgmt/2018-06-01-preview/hdinsight/hdinsightapi/interfaces.go b/services/preview/hdinsight/mgmt/2018-06-01-preview/hdinsight/hdinsightapi/interfaces.go
new file mode 100644
index 000000000000..992b2eb3b91b
--- /dev/null
+++ b/services/preview/hdinsight/mgmt/2018-06-01-preview/hdinsight/hdinsightapi/interfaces.go
@@ -0,0 +1,100 @@
+package hdinsightapi
+
+// Copyright (c) Microsoft and contributors.  All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// Code generated by Microsoft (R) AutoRest Code Generator.
+// Changes may cause incorrect behavior and will be lost if the code is regenerated.
+
+import (
+	"context"
+	"github.com/Azure/azure-sdk-for-go/services/preview/hdinsight/mgmt/2018-06-01-preview/hdinsight"
+	"github.com/Azure/go-autorest/autorest"
+)
+
+// ClustersClientAPI contains the set of methods on the ClustersClient type.
+type ClustersClientAPI interface {
+	Create(ctx context.Context, resourceGroupName string, clusterName string, parameters hdinsight.ClusterCreateParametersExtended) (result hdinsight.ClustersCreateFuture, err error)
+	Delete(ctx context.Context, resourceGroupName string, clusterName string) (result hdinsight.ClustersDeleteFuture, err error)
+	ExecuteScriptActions(ctx context.Context, resourceGroupName string, clusterName string, parameters hdinsight.ExecuteScriptActionParameters) (result hdinsight.ClustersExecuteScriptActionsFuture, err error)
+	Get(ctx context.Context, resourceGroupName string, clusterName string) (result hdinsight.Cluster, err error)
+	List(ctx context.Context) (result hdinsight.ClusterListResultPage, err error)
+	ListByResourceGroup(ctx context.Context, resourceGroupName string) (result hdinsight.ClusterListResultPage, err error)
+	Resize(ctx context.Context, resourceGroupName string, clusterName string, parameters hdinsight.ClusterResizeParameters) (result hdinsight.ClustersResizeFuture, err error)
+	RotateDiskEncryptionKey(ctx context.Context, resourceGroupName string, clusterName string, parameters hdinsight.ClusterDiskEncryptionParameters) (result hdinsight.ClustersRotateDiskEncryptionKeyFuture, err error)
+	Update(ctx context.Context, resourceGroupName string, clusterName string, parameters hdinsight.ClusterPatchParameters) (result hdinsight.Cluster, err error)
+}
+
+var _ ClustersClientAPI = (*hdinsight.ClustersClient)(nil)
+
+// ApplicationsClientAPI contains the set of methods on the ApplicationsClient type.
+type ApplicationsClientAPI interface {
+	Create(ctx context.Context, resourceGroupName string, clusterName string, applicationName string, parameters hdinsight.Application) (result hdinsight.ApplicationsCreateFuture, err error)
+	Delete(ctx context.Context, resourceGroupName string, clusterName string, applicationName string) (result hdinsight.ApplicationsDeleteFuture, err error)
+	Get(ctx context.Context, resourceGroupName string, clusterName string, applicationName string) (result hdinsight.Application, err error)
+	ListByCluster(ctx context.Context, resourceGroupName string, clusterName string) (result hdinsight.ApplicationListResultPage, err error)
+}
+
+var _ ApplicationsClientAPI = (*hdinsight.ApplicationsClient)(nil)
+
+// LocationsClientAPI contains the set of methods on the LocationsClient type.
+type LocationsClientAPI interface {
+	ListUsages(ctx context.Context, location string) (result hdinsight.UsagesListResult, err error)
+}
+
+var _ LocationsClientAPI = (*hdinsight.LocationsClient)(nil)
+
+// ConfigurationsClientAPI contains the set of methods on the ConfigurationsClient type.
+type ConfigurationsClientAPI interface {
+	Get(ctx context.Context, resourceGroupName string, clusterName string, configurationName string) (result hdinsight.SetString, err error)
+	Update(ctx context.Context, resourceGroupName string, clusterName string, configurationName string, parameters map[string]*string) (result hdinsight.ConfigurationsUpdateFuture, err error)
+}
+
+var _ ConfigurationsClientAPI = (*hdinsight.ConfigurationsClient)(nil)
+
+// ExtensionsClientAPI contains the set of methods on the ExtensionsClient type.
+type ExtensionsClientAPI interface {
+	Create(ctx context.Context, resourceGroupName string, clusterName string, extensionName string, parameters hdinsight.Extension) (result hdinsight.ExtensionsCreateFuture, err error)
+	Delete(ctx context.Context, resourceGroupName string, clusterName string, extensionName string) (result hdinsight.ExtensionsDeleteFuture, err error)
+	DisableMonitoring(ctx context.Context, resourceGroupName string, clusterName string) (result hdinsight.ExtensionsDisableMonitoringFuture, err error)
+	EnableMonitoring(ctx context.Context, resourceGroupName string, clusterName string, parameters hdinsight.ClusterMonitoringRequest) (result hdinsight.ExtensionsEnableMonitoringFuture, err error)
+	Get(ctx context.Context, resourceGroupName string, clusterName string, extensionName string) (result hdinsight.Extension, err error)
+	GetMonitoringStatus(ctx context.Context, resourceGroupName string, clusterName string) (result hdinsight.ClusterMonitoringResponse, err error)
+}
+
+var _ ExtensionsClientAPI = (*hdinsight.ExtensionsClient)(nil)
+
+// ScriptActionsClientAPI contains the set of methods on the ScriptActionsClient type.
+type ScriptActionsClientAPI interface {
+	Delete(ctx context.Context, resourceGroupName string, clusterName string, scriptName string) (result autorest.Response, err error)
+	GetExecutionDetail(ctx context.Context, resourceGroupName string, clusterName string, scriptExecutionID string) (result hdinsight.RuntimeScriptActionDetail, err error)
+	ListByCluster(ctx context.Context, resourceGroupName string, clusterName string) (result hdinsight.ScriptActionsListPage, err error)
+}
+
+var _ ScriptActionsClientAPI = (*hdinsight.ScriptActionsClient)(nil)
+
+// ScriptExecutionHistoryClientAPI contains the set of methods on the ScriptExecutionHistoryClient type.
+type ScriptExecutionHistoryClientAPI interface {
+	ListByCluster(ctx context.Context, resourceGroupName string, clusterName string) (result hdinsight.ScriptActionExecutionHistoryListPage, err error)
+	Promote(ctx context.Context, resourceGroupName string, clusterName string, scriptExecutionID string) (result autorest.Response, err error)
+}
+
+var _ ScriptExecutionHistoryClientAPI = (*hdinsight.ScriptExecutionHistoryClient)(nil)
+
+// OperationsClientAPI contains the set of methods on the OperationsClient type.
+type OperationsClientAPI interface {
+	List(ctx context.Context) (result hdinsight.OperationListResultPage, err error)
+}
+
+var _ OperationsClientAPI = (*hdinsight.OperationsClient)(nil)
diff --git a/services/preview/hdinsight/mgmt/2018-06-01-preview/hdinsight/models.go b/services/preview/hdinsight/mgmt/2018-06-01-preview/hdinsight/models.go
index 90983526e061..ab96e299e968 100644
--- a/services/preview/hdinsight/mgmt/2018-06-01-preview/hdinsight/models.go
+++ b/services/preview/hdinsight/mgmt/2018-06-01-preview/hdinsight/models.go
@@ -81,6 +81,23 @@ func PossibleDirectoryTypeValues() []DirectoryType {
 	return []DirectoryType{ActiveDirectory}
 }
 
+// JSONWebKeyEncryptionAlgorithm enumerates the values for json web key encryption algorithm.
+type JSONWebKeyEncryptionAlgorithm string
+
+const (
+	// RSA15 ...
+	RSA15 JSONWebKeyEncryptionAlgorithm = "RSA1_5"
+	// RSAOAEP ...
+	RSAOAEP JSONWebKeyEncryptionAlgorithm = "RSA-OAEP"
+	// RSAOAEP256 ...
+	RSAOAEP256 JSONWebKeyEncryptionAlgorithm = "RSA-OAEP-256"
+)
+
+// PossibleJSONWebKeyEncryptionAlgorithmValues returns an array of possible values for the JSONWebKeyEncryptionAlgorithm const type.
+func PossibleJSONWebKeyEncryptionAlgorithmValues() []JSONWebKeyEncryptionAlgorithm {
+	return []JSONWebKeyEncryptionAlgorithm{RSA15, RSAOAEP, RSAOAEP256}
+}
+
 // OSType enumerates the values for os type.
 type OSType string
 
@@ -261,6 +278,11 @@ func (iter ApplicationListResultIterator) Value() Application {
 	return iter.page.Values()[iter.i]
 }
 
+// Creates a new instance of the ApplicationListResultIterator type.
+func NewApplicationListResultIterator(page ApplicationListResultPage) ApplicationListResultIterator {
+	return ApplicationListResultIterator{page: page}
+}
+
 // IsEmpty returns true if the ListResult contains no values.
 func (alr ApplicationListResult) IsEmpty() bool {
 	return alr.Value == nil || len(*alr.Value) == 0
@@ -330,6 +352,11 @@ func (page ApplicationListResultPage) Values() []Application {
 	return *page.alr.Value
 }
 
+// Creates a new instance of the ApplicationListResultPage type.
+func NewApplicationListResultPage(getNextPage func(context.Context, ApplicationListResult) (ApplicationListResult, error)) ApplicationListResultPage {
+	return ApplicationListResultPage{fn: getNextPage}
+}
+
 // ApplicationProperties the HDInsight cluster application GET response.
 type ApplicationProperties struct {
 	// ComputeProfile - The list of roles in the cluster.
@@ -505,6 +532,8 @@ type ClusterCreateProperties struct {
 	ComputeProfile *ComputeProfile `json:"computeProfile,omitempty"`
 	// StorageProfile - The storage profile.
 	StorageProfile *StorageProfile `json:"storageProfile,omitempty"`
+	// DiskEncryptionProperties - The disk encryption properties.
+	DiskEncryptionProperties *DiskEncryptionProperties `json:"diskEncryptionProperties,omitempty"`
 }
 
 // ClusterDefinition the cluster definition.
@@ -537,6 +566,16 @@ func (cd ClusterDefinition) MarshalJSON() ([]byte, error) {
 	return json.Marshal(objectMap)
 }
 
+// ClusterDiskEncryptionParameters the Disk Encryption Cluster request parameters.
+type ClusterDiskEncryptionParameters struct {
+	// VaultURI - Base key vault URI where the customers key is located eg. https://myvault.vault.azure.net
+	VaultURI *string `json:"vaultUri,omitempty"`
+	// KeyName - Key name that is used for enabling disk encryption.
+	KeyName *string `json:"keyName,omitempty"`
+	// KeyVersion - Specific key version that is used for enabling disk encryption.
+	KeyVersion *string `json:"keyVersion,omitempty"`
+}
+
 // ClusterGetProperties the properties of cluster.
 type ClusterGetProperties struct {
 	// ClusterVersion - The version of the cluster.
@@ -563,6 +602,8 @@ type ClusterGetProperties struct {
 	Errors *[]Errors `json:"errors,omitempty"`
 	// ConnectivityEndpoints - The list of connectivity endpoints.
 	ConnectivityEndpoints *[]ConnectivityEndpoint `json:"connectivityEndpoints,omitempty"`
+	// DiskEncryptionProperties - The disk encryption properties.
+	DiskEncryptionProperties *DiskEncryptionProperties `json:"diskEncryptionProperties,omitempty"`
 }
 
 // ClusterIdentity identity for the cluster.
@@ -678,6 +719,11 @@ func (iter ClusterListResultIterator) Value() Cluster {
 	return iter.page.Values()[iter.i]
 }
 
+// Creates a new instance of the ClusterListResultIterator type.
+func NewClusterListResultIterator(page ClusterListResultPage) ClusterListResultIterator {
+	return ClusterListResultIterator{page: page}
+}
+
 // IsEmpty returns true if the ListResult contains no values.
 func (clr ClusterListResult) IsEmpty() bool {
 	return clr.Value == nil || len(*clr.Value) == 0
@@ -747,6 +793,11 @@ func (page ClusterListResultPage) Values() []Cluster {
 	return *page.clr.Value
 }
 
+// Creates a new instance of the ClusterListResultPage type.
+func NewClusterListResultPage(getNextPage func(context.Context, ClusterListResult) (ClusterListResult, error)) ClusterListResultPage {
+	return ClusterListResultPage{fn: getNextPage}
+}
+
 // ClusterListRuntimeScriptActionDetailResult the list runtime script action detail response.
 type ClusterListRuntimeScriptActionDetailResult struct {
 	// Value - The list of persisted script action details for the cluster.
@@ -891,6 +942,29 @@ func (future *ClustersResizeFuture) Result(client ClustersClient) (ar autorest.R
 	return
 }
 
+// ClustersRotateDiskEncryptionKeyFuture an abstraction for monitoring and retrieving the results of a
+// long-running operation.
+type ClustersRotateDiskEncryptionKeyFuture struct {
+	azure.Future
+}
+
+// Result returns the result of the asynchronous operation.
+// If the operation has not completed it will return an error.
+func (future *ClustersRotateDiskEncryptionKeyFuture) Result(client ClustersClient) (ar autorest.Response, err error) {
+	var done bool
+	done, err = future.Done(client)
+	if err != nil {
+		err = autorest.NewErrorWithError(err, "hdinsight.ClustersRotateDiskEncryptionKeyFuture", "Result", future.Response(), "Polling failure")
+		return
+	}
+	if !done {
+		err = azure.NewAsyncOpIncompleteError("hdinsight.ClustersRotateDiskEncryptionKeyFuture")
+		return
+	}
+	ar.Response = future.Response()
+	return
+}
+
 // ComputeProfile describes the compute profile.
 type ComputeProfile struct {
 	// Roles - The list of roles in the cluster.
@@ -942,6 +1016,20 @@ type DataDisksGroups struct {
 	DiskSizeGB *int32 `json:"diskSizeGB,omitempty"`
 }
 
+// DiskEncryptionProperties the disk encryption properties
+type DiskEncryptionProperties struct {
+	// VaultURI - Base key vault URI where the customers key is located eg. https://myvault.vault.azure.net
+	VaultURI *string `json:"vaultUri,omitempty"`
+	// KeyName - Key name that is used for enabling disk encryption.
+	KeyName *string `json:"keyName,omitempty"`
+	// KeyVersion - Specific key version that is used for enabling disk encryption.
+	KeyVersion *string `json:"keyVersion,omitempty"`
+	// EncryptionAlgorithm - Algorithm identifier for encryption, default RSA-OAEP. Possible values include: 'RSAOAEP', 'RSAOAEP256', 'RSA15'
+	EncryptionAlgorithm JSONWebKeyEncryptionAlgorithm `json:"encryptionAlgorithm,omitempty"`
+	// MsiResourceID - Resource ID of Managed Identity that is used to access the key vault.
+	MsiResourceID *string `json:"msiResourceId,omitempty"`
+}
+
 // ErrorResponse describes the format of Error response.
 type ErrorResponse struct {
 	// Code - Error code
@@ -1177,6 +1265,11 @@ func (iter OperationListResultIterator) Value() Operation {
 	return iter.page.Values()[iter.i]
 }
 
+// Creates a new instance of the OperationListResultIterator type.
+func NewOperationListResultIterator(page OperationListResultPage) OperationListResultIterator {
+	return OperationListResultIterator{page: page}
+}
+
 // IsEmpty returns true if the ListResult contains no values.
 func (olr OperationListResult) IsEmpty() bool {
 	return olr.Value == nil || len(*olr.Value) == 0
@@ -1246,6 +1339,11 @@ func (page OperationListResultPage) Values() []Operation {
 	return *page.olr.Value
 }
 
+// Creates a new instance of the OperationListResultPage type.
+func NewOperationListResultPage(getNextPage func(context.Context, OperationListResult) (OperationListResult, error)) OperationListResultPage {
+	return OperationListResultPage{fn: getNextPage}
+}
+
 // OperationResource the azure async operation response.
 type OperationResource struct {
 	// Status - The async operation state. Possible values include: 'InProgress', 'Succeeded', 'Failed'
@@ -1428,6 +1526,11 @@ func (iter ScriptActionExecutionHistoryListIterator) Value() RuntimeScriptAction
 	return iter.page.Values()[iter.i]
 }
 
+// Creates a new instance of the ScriptActionExecutionHistoryListIterator type.
+func NewScriptActionExecutionHistoryListIterator(page ScriptActionExecutionHistoryListPage) ScriptActionExecutionHistoryListIterator {
+	return ScriptActionExecutionHistoryListIterator{page: page}
+}
+
 // IsEmpty returns true if the ListResult contains no values.
 func (saehl ScriptActionExecutionHistoryList) IsEmpty() bool {
 	return saehl.Value == nil || len(*saehl.Value) == 0
@@ -1497,6 +1600,11 @@ func (page ScriptActionExecutionHistoryListPage) Values() []RuntimeScriptActionD
 	return *page.saehl.Value
 }
 
+// Creates a new instance of the ScriptActionExecutionHistoryListPage type.
+func NewScriptActionExecutionHistoryListPage(getNextPage func(context.Context, ScriptActionExecutionHistoryList) (ScriptActionExecutionHistoryList, error)) ScriptActionExecutionHistoryListPage {
+	return ScriptActionExecutionHistoryListPage{fn: getNextPage}
+}
+
 // ScriptActionExecutionSummary the execution summary of a script action.
 type ScriptActionExecutionSummary struct {
 	// Status - The status of script action execution.
@@ -1586,6 +1694,11 @@ func (iter ScriptActionsListIterator) Value() RuntimeScriptActionDetail {
 	return iter.page.Values()[iter.i]
 }
 
+// Creates a new instance of the ScriptActionsListIterator type.
+func NewScriptActionsListIterator(page ScriptActionsListPage) ScriptActionsListIterator {
+	return ScriptActionsListIterator{page: page}
+}
+
 // IsEmpty returns true if the ListResult contains no values.
 func (sal ScriptActionsList) IsEmpty() bool {
 	return sal.Value == nil || len(*sal.Value) == 0
@@ -1655,6 +1768,11 @@ func (page ScriptActionsListPage) Values() []RuntimeScriptActionDetail {
 	return *page.sal.Value
 }
 
+// Creates a new instance of the ScriptActionsListPage type.
+func NewScriptActionsListPage(getNextPage func(context.Context, ScriptActionsList) (ScriptActionsList, error)) ScriptActionsListPage {
+	return ScriptActionsListPage{fn: getNextPage}
+}
+
 // SecurityProfile the security profile which contains Ssh public key for the HDInsight cluster.
 type SecurityProfile struct {
 	// DirectoryType - The directory type. Possible values include: 'ActiveDirectory'