diff --git a/sdk/datadog/arm-datadog/src/microsoftDatadogClientContext.ts b/sdk/datadog/arm-datadog/src/microsoftDatadogClientContext.ts
index 0a05828363b0..ca29e487b8cd 100644
--- a/sdk/datadog/arm-datadog/src/microsoftDatadogClientContext.ts
+++ b/sdk/datadog/arm-datadog/src/microsoftDatadogClientContext.ts
@@ -36,7 +36,7 @@ export class MicrosoftDatadogClientContext extends msRestAzure.AzureServiceClien
     if (!options) {
       options = {};
     }
-    if (!options.userAgent) {
+    if(!options.userAgent) {
       const defaultUserAgent = msRestAzure.getDefaultUserAgentValue();
       options.userAgent = `${packageName}/${packageVersion} ${defaultUserAgent}`;
     }
@@ -51,10 +51,10 @@ export class MicrosoftDatadogClientContext extends msRestAzure.AzureServiceClien
     this.credentials = credentials;
     this.subscriptionId = subscriptionId;
 
-    if (options.acceptLanguage !== null && options.acceptLanguage !== undefined) {
+    if(options.acceptLanguage !== null && options.acceptLanguage !== undefined) {
       this.acceptLanguage = options.acceptLanguage;
     }
-    if (options.longRunningOperationRetryTimeout !== null && options.longRunningOperationRetryTimeout !== undefined) {
+    if(options.longRunningOperationRetryTimeout !== null && options.longRunningOperationRetryTimeout !== undefined) {
       this.longRunningOperationRetryTimeout = options.longRunningOperationRetryTimeout;
     }
   }
diff --git a/sdk/datadog/arm-datadog/src/models/index.ts b/sdk/datadog/arm-datadog/src/models/index.ts
index 46bb6b776d71..e9bea86f04b0 100644
--- a/sdk/datadog/arm-datadog/src/models/index.ts
+++ b/sdk/datadog/arm-datadog/src/models/index.ts
@@ -431,6 +431,7 @@ export interface DatadogMonitorResourceUpdateParameters {
    * The new tags of the monitor resource.
    */
   tags?: { [propertyName: string]: string };
+  sku?: ResourceSku;
 }
 
 /**
@@ -680,6 +681,13 @@ export interface MonitorsBeginCreateOptionalParams extends msRest.RequestOptions
   body?: DatadogMonitorResource;
 }
 
+/**
+ * Optional Parameters.
+ */
+export interface MonitorsBeginUpdateOptionalParams extends msRest.RequestOptionsBase {
+  body?: DatadogMonitorResourceUpdateParameters;
+}
+
 /**
  * Optional Parameters.
  */
@@ -1181,6 +1189,26 @@ export type MonitorsBeginCreateResponse = DatadogMonitorResource & {
     };
 };
 
+/**
+ * Contains response data for the beginUpdate operation.
+ */
+export type MonitorsBeginUpdateResponse = DatadogMonitorResource & {
+  /**
+   * The underlying HTTP response.
+   */
+  _response: msRest.HttpResponse & {
+      /**
+       * The response body as text (string format)
+       */
+      bodyAsText: string;
+
+      /**
+       * The response body as parsed JSON or XML
+       */
+      parsedBody: DatadogMonitorResource;
+    };
+};
+
 /**
  * Contains response data for the listApiKeysNext operation.
  */
diff --git a/sdk/datadog/arm-datadog/src/models/mappers.ts b/sdk/datadog/arm-datadog/src/models/mappers.ts
index 5ee16538aa42..94065f67cf02 100644
--- a/sdk/datadog/arm-datadog/src/models/mappers.ts
+++ b/sdk/datadog/arm-datadog/src/models/mappers.ts
@@ -753,6 +753,13 @@ export const DatadogMonitorResourceUpdateParameters: msRest.CompositeMapper = {
             }
           }
         }
+      },
+      sku: {
+        serializedName: "sku",
+        type: {
+          name: "Composite",
+          className: "ResourceSku"
+        }
       }
     }
   }
diff --git a/sdk/datadog/arm-datadog/src/operations/monitors.ts b/sdk/datadog/arm-datadog/src/operations/monitors.ts
index 3e530c98a4c8..b1869664b3f3 100644
--- a/sdk/datadog/arm-datadog/src/operations/monitors.ts
+++ b/sdk/datadog/arm-datadog/src/operations/monitors.ts
@@ -322,29 +322,9 @@ export class Monitors {
    * @param [options] The optional parameters
    * @returns Promise<Models.MonitorsUpdateResponse>
    */
-  update(resourceGroupName: string, monitorName: string, options?: Models.MonitorsUpdateOptionalParams): Promise<Models.MonitorsUpdateResponse>;
-  /**
-   * @param resourceGroupName The name of the resource group. The name is case insensitive.
-   * @param monitorName Monitor resource name
-   * @param callback The callback
-   */
-  update(resourceGroupName: string, monitorName: string, callback: msRest.ServiceCallback<Models.DatadogMonitorResource>): void;
-  /**
-   * @param resourceGroupName The name of the resource group. The name is case insensitive.
-   * @param monitorName Monitor resource name
-   * @param options The optional parameters
-   * @param callback The callback
-   */
-  update(resourceGroupName: string, monitorName: string, options: Models.MonitorsUpdateOptionalParams, callback: msRest.ServiceCallback<Models.DatadogMonitorResource>): void;
-  update(resourceGroupName: string, monitorName: string, options?: Models.MonitorsUpdateOptionalParams | msRest.ServiceCallback<Models.DatadogMonitorResource>, callback?: msRest.ServiceCallback<Models.DatadogMonitorResource>): Promise<Models.MonitorsUpdateResponse> {
-    return this.client.sendOperationRequest(
-      {
-        resourceGroupName,
-        monitorName,
-        options
-      },
-      updateOperationSpec,
-      callback) as Promise<Models.MonitorsUpdateResponse>;
+  update(resourceGroupName: string, monitorName: string, options?: Models.MonitorsUpdateOptionalParams): Promise<Models.MonitorsUpdateResponse> {
+    return this.beginUpdate(resourceGroupName,monitorName,options)
+      .then(lroPoller => lroPoller.pollUntilFinished()) as Promise<Models.MonitorsUpdateResponse>;
   }
 
   /**
@@ -409,6 +389,24 @@ export class Monitors {
       options);
   }
 
+  /**
+   * @summary Update a monitor resource.
+   * @param resourceGroupName The name of the resource group. The name is case insensitive.
+   * @param monitorName Monitor resource name
+   * @param [options] The optional parameters
+   * @returns Promise<msRestAzure.LROPoller>
+   */
+  beginUpdate(resourceGroupName: string, monitorName: string, options?: Models.MonitorsBeginUpdateOptionalParams): Promise<msRestAzure.LROPoller> {
+    return this.client.sendLRORequest(
+      {
+        resourceGroupName,
+        monitorName,
+        options
+      },
+      beginUpdateOperationSpec,
+      options);
+  }
+
   /**
    * @summary Delete a monitor resource.
    * @param resourceGroupName The name of the resource group. The name is case insensitive.
@@ -826,9 +824,9 @@ const getOperationSpec: msRest.OperationSpec = {
   serializer
 };
 
-const updateOperationSpec: msRest.OperationSpec = {
-  httpMethod: "PATCH",
-  path: "subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.Datadog/monitors/{monitorName}",
+const refreshSetPasswordLinkOperationSpec: msRest.OperationSpec = {
+  httpMethod: "POST",
+  path: "subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.Datadog/monitors/{monitorName}/refreshSetPasswordLink",
   urlParameters: [
     Parameters.subscriptionId,
     Parameters.resourceGroupName,
@@ -840,16 +838,9 @@ const updateOperationSpec: msRest.OperationSpec = {
   headerParameters: [
     Parameters.acceptLanguage
   ],
-  requestBody: {
-    parameterPath: [
-      "options",
-      "body"
-    ],
-    mapper: Mappers.DatadogMonitorResourceUpdateParameters
-  },
   responses: {
     200: {
-      bodyMapper: Mappers.DatadogMonitorResource
+      bodyMapper: Mappers.DatadogSetPasswordLink
     },
     default: {
       bodyMapper: Mappers.ErrorResponse
@@ -858,9 +849,9 @@ const updateOperationSpec: msRest.OperationSpec = {
   serializer
 };
 
-const refreshSetPasswordLinkOperationSpec: msRest.OperationSpec = {
-  httpMethod: "POST",
-  path: "subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.Datadog/monitors/{monitorName}/refreshSetPasswordLink",
+const beginCreateOperationSpec: msRest.OperationSpec = {
+  httpMethod: "PUT",
+  path: "subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.Datadog/monitors/{monitorName}",
   urlParameters: [
     Parameters.subscriptionId,
     Parameters.resourceGroupName,
@@ -872,9 +863,19 @@ const refreshSetPasswordLinkOperationSpec: msRest.OperationSpec = {
   headerParameters: [
     Parameters.acceptLanguage
   ],
+  requestBody: {
+    parameterPath: [
+      "options",
+      "body"
+    ],
+    mapper: Mappers.DatadogMonitorResource
+  },
   responses: {
     200: {
-      bodyMapper: Mappers.DatadogSetPasswordLink
+      bodyMapper: Mappers.DatadogMonitorResource
+    },
+    201: {
+      bodyMapper: Mappers.DatadogMonitorResource
     },
     default: {
       bodyMapper: Mappers.ErrorResponse
@@ -883,8 +884,8 @@ const refreshSetPasswordLinkOperationSpec: msRest.OperationSpec = {
   serializer
 };
 
-const beginCreateOperationSpec: msRest.OperationSpec = {
-  httpMethod: "PUT",
+const beginUpdateOperationSpec: msRest.OperationSpec = {
+  httpMethod: "PATCH",
   path: "subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.Datadog/monitors/{monitorName}",
   urlParameters: [
     Parameters.subscriptionId,
@@ -902,7 +903,7 @@ const beginCreateOperationSpec: msRest.OperationSpec = {
       "options",
       "body"
     ],
-    mapper: Mappers.DatadogMonitorResource
+    mapper: Mappers.DatadogMonitorResourceUpdateParameters
   },
   responses: {
     200: {