diff --git a/sdk/cognitiveservices/Microsoft.Azure.Management.CognitiveServices/src/Generated/CognitiveServicesManagementClient.cs b/sdk/cognitiveservices/Microsoft.Azure.Management.CognitiveServices/src/Generated/CognitiveServicesManagementClient.cs
index 7faff410cf95..ffe7811c27c8 100644
--- a/sdk/cognitiveservices/Microsoft.Azure.Management.CognitiveServices/src/Generated/CognitiveServicesManagementClient.cs
+++ b/sdk/cognitiveservices/Microsoft.Azure.Management.CognitiveServices/src/Generated/CognitiveServicesManagementClient.cs
@@ -20,6 +20,8 @@ namespace Microsoft.Azure.Management.CognitiveServices
     using System.Linq;
     using System.Net;
     using System.Net.Http;
+    using System.Threading;
+    using System.Threading.Tasks;
 
     /// <summary>
     /// Cognitive Services Management Client
@@ -375,5 +377,210 @@ private void Initialize()
             DeserializationSettings.Converters.Add(new TransformationJsonConverter());
             DeserializationSettings.Converters.Add(new CloudErrorJsonConverter());
         }
+        /// <summary>
+        /// Check whether a domain is available.
+        /// </summary>
+        /// <param name='subdomainName'>
+        /// The subdomain name to use.
+        /// </param>
+        /// <param name='type'>
+        /// The Type of the resource.
+        /// </param>
+        /// <param name='customHeaders'>
+        /// Headers that will be added to request.
+        /// </param>
+        /// <param name='cancellationToken'>
+        /// The cancellation token.
+        /// </param>
+        /// <exception cref="CloudException">
+        /// Thrown when the operation returned an invalid status code
+        /// </exception>
+        /// <exception cref="SerializationException">
+        /// Thrown when unable to deserialize the response
+        /// </exception>
+        /// <exception cref="ValidationException">
+        /// Thrown when a required parameter is null
+        /// </exception>
+        /// <exception cref="System.ArgumentNullException">
+        /// Thrown when a required parameter is null
+        /// </exception>
+        /// <return>
+        /// A response object containing the response body and response headers.
+        /// </return>
+        public async Task<AzureOperationResponse<CheckDomainAvailabilityResult>> CheckDomainAvailabilityWithHttpMessagesAsync(string subdomainName, string type, Dictionary<string, List<string>> customHeaders = null, CancellationToken cancellationToken = default(CancellationToken))
+        {
+            if (SubscriptionId == null)
+            {
+                throw new ValidationException(ValidationRules.CannotBeNull, "this.SubscriptionId");
+            }
+            if (ApiVersion == null)
+            {
+                throw new ValidationException(ValidationRules.CannotBeNull, "this.ApiVersion");
+            }
+            if (subdomainName == null)
+            {
+                throw new ValidationException(ValidationRules.CannotBeNull, "subdomainName");
+            }
+            if (type == null)
+            {
+                throw new ValidationException(ValidationRules.CannotBeNull, "type");
+            }
+            CheckDomainAvailabilityParameter parameters = new CheckDomainAvailabilityParameter();
+            if (subdomainName != null || type != null)
+            {
+                parameters.SubdomainName = subdomainName;
+                parameters.Type = type;
+            }
+            // Tracing
+            bool _shouldTrace = ServiceClientTracing.IsEnabled;
+            string _invocationId = null;
+            if (_shouldTrace)
+            {
+                _invocationId = ServiceClientTracing.NextInvocationId.ToString();
+                Dictionary<string, object> tracingParameters = new Dictionary<string, object>();
+                tracingParameters.Add("parameters", parameters);
+                tracingParameters.Add("cancellationToken", cancellationToken);
+                ServiceClientTracing.Enter(_invocationId, this, "CheckDomainAvailability", tracingParameters);
+            }
+            // Construct URL
+            var _baseUrl = BaseUri.AbsoluteUri;
+            var _url = new System.Uri(new System.Uri(_baseUrl + (_baseUrl.EndsWith("/") ? "" : "/")), "subscriptions/{subscriptionId}/providers/Microsoft.CognitiveServices/checkDomainAvailability").ToString();
+            _url = _url.Replace("{subscriptionId}", System.Uri.EscapeDataString(SubscriptionId));
+            List<string> _queryParameters = new List<string>();
+            if (ApiVersion != null)
+            {
+                _queryParameters.Add(string.Format("api-version={0}", System.Uri.EscapeDataString(ApiVersion)));
+            }
+            if (_queryParameters.Count > 0)
+            {
+                _url += (_url.Contains("?") ? "&" : "?") + string.Join("&", _queryParameters);
+            }
+            // Create HTTP transport objects
+            var _httpRequest = new HttpRequestMessage();
+            HttpResponseMessage _httpResponse = null;
+            _httpRequest.Method = new HttpMethod("POST");
+            _httpRequest.RequestUri = new System.Uri(_url);
+            // Set Headers
+            if (GenerateClientRequestId != null && GenerateClientRequestId.Value)
+            {
+                _httpRequest.Headers.TryAddWithoutValidation("x-ms-client-request-id", System.Guid.NewGuid().ToString());
+            }
+            if (AcceptLanguage != null)
+            {
+                if (_httpRequest.Headers.Contains("accept-language"))
+                {
+                    _httpRequest.Headers.Remove("accept-language");
+                }
+                _httpRequest.Headers.TryAddWithoutValidation("accept-language", AcceptLanguage);
+            }
+
+
+            if (customHeaders != null)
+            {
+                foreach(var _header in customHeaders)
+                {
+                    if (_httpRequest.Headers.Contains(_header.Key))
+                    {
+                        _httpRequest.Headers.Remove(_header.Key);
+                    }
+                    _httpRequest.Headers.TryAddWithoutValidation(_header.Key, _header.Value);
+                }
+            }
+
+            // Serialize Request
+            string _requestContent = null;
+            if(parameters != null)
+            {
+                _requestContent = SafeJsonConvert.SerializeObject(parameters, SerializationSettings);
+                _httpRequest.Content = new StringContent(_requestContent, System.Text.Encoding.UTF8);
+                _httpRequest.Content.Headers.ContentType =System.Net.Http.Headers.MediaTypeHeaderValue.Parse("application/json; charset=utf-8");
+            }
+            // Set Credentials
+            if (Credentials != null)
+            {
+                cancellationToken.ThrowIfCancellationRequested();
+                await Credentials.ProcessHttpRequestAsync(_httpRequest, cancellationToken).ConfigureAwait(false);
+            }
+            // Send Request
+            if (_shouldTrace)
+            {
+                ServiceClientTracing.SendRequest(_invocationId, _httpRequest);
+            }
+            cancellationToken.ThrowIfCancellationRequested();
+            _httpResponse = await HttpClient.SendAsync(_httpRequest, cancellationToken).ConfigureAwait(false);
+            if (_shouldTrace)
+            {
+                ServiceClientTracing.ReceiveResponse(_invocationId, _httpResponse);
+            }
+            HttpStatusCode _statusCode = _httpResponse.StatusCode;
+            cancellationToken.ThrowIfCancellationRequested();
+            string _responseContent = null;
+            if ((int)_statusCode != 200)
+            {
+                var ex = new CloudException(string.Format("Operation returned an invalid status code '{0}'", _statusCode));
+                try
+                {
+                    _responseContent = await _httpResponse.Content.ReadAsStringAsync().ConfigureAwait(false);
+                    CloudError _errorBody =  SafeJsonConvert.DeserializeObject<CloudError>(_responseContent, DeserializationSettings);
+                    if (_errorBody != null)
+                    {
+                        ex = new CloudException(_errorBody.Message);
+                        ex.Body = _errorBody;
+                    }
+                }
+                catch (JsonException)
+                {
+                    // Ignore the exception
+                }
+                ex.Request = new HttpRequestMessageWrapper(_httpRequest, _requestContent);
+                ex.Response = new HttpResponseMessageWrapper(_httpResponse, _responseContent);
+                if (_httpResponse.Headers.Contains("x-ms-request-id"))
+                {
+                    ex.RequestId = _httpResponse.Headers.GetValues("x-ms-request-id").FirstOrDefault();
+                }
+                if (_shouldTrace)
+                {
+                    ServiceClientTracing.Error(_invocationId, ex);
+                }
+                _httpRequest.Dispose();
+                if (_httpResponse != null)
+                {
+                    _httpResponse.Dispose();
+                }
+                throw ex;
+            }
+            // Create Result
+            var _result = new AzureOperationResponse<CheckDomainAvailabilityResult>();
+            _result.Request = _httpRequest;
+            _result.Response = _httpResponse;
+            if (_httpResponse.Headers.Contains("x-ms-request-id"))
+            {
+                _result.RequestId = _httpResponse.Headers.GetValues("x-ms-request-id").FirstOrDefault();
+            }
+            // Deserialize Response
+            if ((int)_statusCode == 200)
+            {
+                _responseContent = await _httpResponse.Content.ReadAsStringAsync().ConfigureAwait(false);
+                try
+                {
+                    _result.Body = SafeJsonConvert.DeserializeObject<CheckDomainAvailabilityResult>(_responseContent, DeserializationSettings);
+                }
+                catch (JsonException ex)
+                {
+                    _httpRequest.Dispose();
+                    if (_httpResponse != null)
+                    {
+                        _httpResponse.Dispose();
+                    }
+                    throw new SerializationException("Unable to deserialize the response.", _responseContent, ex);
+                }
+            }
+            if (_shouldTrace)
+            {
+                ServiceClientTracing.Exit(_invocationId, _result);
+            }
+            return _result;
+        }
+
     }
 }
diff --git a/sdk/cognitiveservices/Microsoft.Azure.Management.CognitiveServices/src/Generated/CognitiveServicesManagementClientExtensions.cs b/sdk/cognitiveservices/Microsoft.Azure.Management.CognitiveServices/src/Generated/CognitiveServicesManagementClientExtensions.cs
new file mode 100644
index 000000000000..a92a604ee2ee
--- /dev/null
+++ b/sdk/cognitiveservices/Microsoft.Azure.Management.CognitiveServices/src/Generated/CognitiveServicesManagementClientExtensions.cs
@@ -0,0 +1,65 @@
+// <auto-generated>
+// 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.
+// </auto-generated>
+
+namespace Microsoft.Azure.Management.CognitiveServices
+{
+    using Microsoft.Rest;
+    using Microsoft.Rest.Azure;
+    using Models;
+    using System.Threading;
+    using System.Threading.Tasks;
+
+    /// <summary>
+    /// Extension methods for CognitiveServicesManagementClient.
+    /// </summary>
+    public static partial class CognitiveServicesManagementClientExtensions
+    {
+            /// <summary>
+            /// Check whether a domain is available.
+            /// </summary>
+            /// <param name='operations'>
+            /// The operations group for this extension method.
+            /// </param>
+            /// <param name='subdomainName'>
+            /// The subdomain name to use.
+            /// </param>
+            /// <param name='type'>
+            /// The Type of the resource.
+            /// </param>
+            public static CheckDomainAvailabilityResult CheckDomainAvailability(this ICognitiveServicesManagementClient operations, string subdomainName, string type)
+            {
+                return operations.CheckDomainAvailabilityAsync(subdomainName, type).GetAwaiter().GetResult();
+            }
+
+            /// <summary>
+            /// Check whether a domain is available.
+            /// </summary>
+            /// <param name='operations'>
+            /// The operations group for this extension method.
+            /// </param>
+            /// <param name='subdomainName'>
+            /// The subdomain name to use.
+            /// </param>
+            /// <param name='type'>
+            /// The Type of the resource.
+            /// </param>
+            /// <param name='cancellationToken'>
+            /// The cancellation token.
+            /// </param>
+            public static async Task<CheckDomainAvailabilityResult> CheckDomainAvailabilityAsync(this ICognitiveServicesManagementClient operations, string subdomainName, string type, CancellationToken cancellationToken = default(CancellationToken))
+            {
+                using (var _result = await operations.CheckDomainAvailabilityWithHttpMessagesAsync(subdomainName, type, null, cancellationToken).ConfigureAwait(false))
+                {
+                    return _result.Body;
+                }
+            }
+
+    }
+}
diff --git a/sdk/cognitiveservices/Microsoft.Azure.Management.CognitiveServices/src/Generated/ICognitiveServicesManagementClient.cs b/sdk/cognitiveservices/Microsoft.Azure.Management.CognitiveServices/src/Generated/ICognitiveServicesManagementClient.cs
index 6e897bac33a1..9229ed9da261 100644
--- a/sdk/cognitiveservices/Microsoft.Azure.Management.CognitiveServices/src/Generated/ICognitiveServicesManagementClient.cs
+++ b/sdk/cognitiveservices/Microsoft.Azure.Management.CognitiveServices/src/Generated/ICognitiveServicesManagementClient.cs
@@ -14,6 +14,10 @@ namespace Microsoft.Azure.Management.CognitiveServices
     using Microsoft.Rest.Azure;
     using Models;
     using Newtonsoft.Json;
+    using System.Collections;
+    using System.Collections.Generic;
+    using System.Threading;
+    using System.Threading.Tasks;
 
     /// <summary>
     /// Cognitive Services Management Client
@@ -90,5 +94,22 @@ public partial interface ICognitiveServicesManagementClient : System.IDisposable
         /// </summary>
         ICheckSkuAvailabilityOperations CheckSkuAvailability { get; }
 
+        /// <summary>
+        /// Check whether a domain is available.
+        /// </summary>
+        /// <param name='subdomainName'>
+        /// The subdomain name to use.
+        /// </param>
+        /// <param name='type'>
+        /// The Type of the resource.
+        /// </param>
+        /// <param name='customHeaders'>
+        /// The headers that will be added to request.
+        /// </param>
+        /// <param name='cancellationToken'>
+        /// The cancellation token.
+        /// </param>
+        Task<AzureOperationResponse<CheckDomainAvailabilityResult>> CheckDomainAvailabilityWithHttpMessagesAsync(string subdomainName, string type, Dictionary<string, List<string>> customHeaders = null, CancellationToken cancellationToken = default(CancellationToken));
+
     }
 }
diff --git a/sdk/cognitiveservices/Microsoft.Azure.Management.CognitiveServices/src/Generated/Models/CheckDomainAvailabilityParameter.cs b/sdk/cognitiveservices/Microsoft.Azure.Management.CognitiveServices/src/Generated/Models/CheckDomainAvailabilityParameter.cs
new file mode 100644
index 000000000000..2fc0681513a9
--- /dev/null
+++ b/sdk/cognitiveservices/Microsoft.Azure.Management.CognitiveServices/src/Generated/Models/CheckDomainAvailabilityParameter.cs
@@ -0,0 +1,79 @@
+// <auto-generated>
+// 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.
+// </auto-generated>
+
+namespace Microsoft.Azure.Management.CognitiveServices.Models
+{
+    using Microsoft.Rest;
+    using Newtonsoft.Json;
+    using System.Linq;
+
+    /// <summary>
+    /// Check Domain availability parameter.
+    /// </summary>
+    public partial class CheckDomainAvailabilityParameter
+    {
+        /// <summary>
+        /// Initializes a new instance of the CheckDomainAvailabilityParameter
+        /// class.
+        /// </summary>
+        public CheckDomainAvailabilityParameter()
+        {
+            CustomInit();
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the CheckDomainAvailabilityParameter
+        /// class.
+        /// </summary>
+        /// <param name="subdomainName">The subdomain name to use.</param>
+        /// <param name="type">The Type of the resource.</param>
+        public CheckDomainAvailabilityParameter(string subdomainName, string type)
+        {
+            SubdomainName = subdomainName;
+            Type = type;
+            CustomInit();
+        }
+
+        /// <summary>
+        /// An initialization method that performs custom operations like setting defaults
+        /// </summary>
+        partial void CustomInit();
+
+        /// <summary>
+        /// Gets or sets the subdomain name to use.
+        /// </summary>
+        [JsonProperty(PropertyName = "subdomainName")]
+        public string SubdomainName { get; set; }
+
+        /// <summary>
+        /// Gets or sets the Type of the resource.
+        /// </summary>
+        [JsonProperty(PropertyName = "type")]
+        public string Type { get; set; }
+
+        /// <summary>
+        /// Validate the object.
+        /// </summary>
+        /// <exception cref="ValidationException">
+        /// Thrown if validation fails
+        /// </exception>
+        public virtual void Validate()
+        {
+            if (SubdomainName == null)
+            {
+                throw new ValidationException(ValidationRules.CannotBeNull, "SubdomainName");
+            }
+            if (Type == null)
+            {
+                throw new ValidationException(ValidationRules.CannotBeNull, "Type");
+            }
+        }
+    }
+}
diff --git a/sdk/cognitiveservices/Microsoft.Azure.Management.CognitiveServices/src/Generated/Models/CheckDomainAvailabilityResult.cs b/sdk/cognitiveservices/Microsoft.Azure.Management.CognitiveServices/src/Generated/Models/CheckDomainAvailabilityResult.cs
new file mode 100644
index 000000000000..7582f4616c84
--- /dev/null
+++ b/sdk/cognitiveservices/Microsoft.Azure.Management.CognitiveServices/src/Generated/Models/CheckDomainAvailabilityResult.cs
@@ -0,0 +1,78 @@
+// <auto-generated>
+// 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.
+// </auto-generated>
+
+namespace Microsoft.Azure.Management.CognitiveServices.Models
+{
+    using Newtonsoft.Json;
+    using System.Linq;
+
+    /// <summary>
+    /// Check Domain availability result.
+    /// </summary>
+    public partial class CheckDomainAvailabilityResult
+    {
+        /// <summary>
+        /// Initializes a new instance of the CheckDomainAvailabilityResult
+        /// class.
+        /// </summary>
+        public CheckDomainAvailabilityResult()
+        {
+            CustomInit();
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the CheckDomainAvailabilityResult
+        /// class.
+        /// </summary>
+        /// <param name="isSubdomainAvailable">Indicates the given SKU is
+        /// available or not.</param>
+        /// <param name="reason">Reason why the SKU is not available.</param>
+        /// <param name="subdomainName">The subdomain name to use.</param>
+        /// <param name="type">The Type of the resource.</param>
+        public CheckDomainAvailabilityResult(bool? isSubdomainAvailable = default(bool?), string reason = default(string), string subdomainName = default(string), string type = default(string))
+        {
+            IsSubdomainAvailable = isSubdomainAvailable;
+            Reason = reason;
+            SubdomainName = subdomainName;
+            Type = type;
+            CustomInit();
+        }
+
+        /// <summary>
+        /// An initialization method that performs custom operations like setting defaults
+        /// </summary>
+        partial void CustomInit();
+
+        /// <summary>
+        /// Gets or sets indicates the given SKU is available or not.
+        /// </summary>
+        [JsonProperty(PropertyName = "isSubdomainAvailable")]
+        public bool? IsSubdomainAvailable { get; set; }
+
+        /// <summary>
+        /// Gets or sets reason why the SKU is not available.
+        /// </summary>
+        [JsonProperty(PropertyName = "reason")]
+        public string Reason { get; set; }
+
+        /// <summary>
+        /// Gets or sets the subdomain name to use.
+        /// </summary>
+        [JsonProperty(PropertyName = "subdomainName")]
+        public string SubdomainName { get; set; }
+
+        /// <summary>
+        /// Gets or sets the Type of the resource.
+        /// </summary>
+        [JsonProperty(PropertyName = "type")]
+        public string Type { get; set; }
+
+    }
+}
diff --git a/sdk/cognitiveservices/Microsoft.Azure.Management.CognitiveServices/src/Generated/Models/IPRule.cs b/sdk/cognitiveservices/Microsoft.Azure.Management.CognitiveServices/src/Generated/Models/IpRule.cs
similarity index 100%
rename from sdk/cognitiveservices/Microsoft.Azure.Management.CognitiveServices/src/Generated/Models/IPRule.cs
rename to sdk/cognitiveservices/Microsoft.Azure.Management.CognitiveServices/src/Generated/Models/IpRule.cs
diff --git a/sdk/cognitiveservices/Microsoft.Azure.Management.CognitiveServices/src/Generated/SdkInfo_CognitiveServicesManagementClient.cs b/sdk/cognitiveservices/Microsoft.Azure.Management.CognitiveServices/src/Generated/SdkInfo_CognitiveServicesManagementClient.cs
index 230a99061186..48cf31a0e168 100644
--- a/sdk/cognitiveservices/Microsoft.Azure.Management.CognitiveServices/src/Generated/SdkInfo_CognitiveServicesManagementClient.cs
+++ b/sdk/cognitiveservices/Microsoft.Azure.Management.CognitiveServices/src/Generated/SdkInfo_CognitiveServicesManagementClient.cs
@@ -20,22 +20,12 @@ public static IEnumerable<Tuple<string, string, string>> ApiInfo_CognitiveServic
               return new Tuple<string, string, string>[]
               {
                 new Tuple<string, string, string>("CognitiveServices", "Accounts", "2017-04-18"),
+                new Tuple<string, string, string>("CognitiveServices", "CheckDomainAvailability", "2017-04-18"),
                 new Tuple<string, string, string>("CognitiveServices", "CheckSkuAvailability", "2017-04-18"),
                 new Tuple<string, string, string>("CognitiveServices", "Operations", "2017-04-18"),
                 new Tuple<string, string, string>("CognitiveServices", "ResourceSkus", "2017-04-18"),
               }.AsEnumerable();
           }
       }
-      // BEGIN: Code Generation Metadata Section
-      public static readonly String AutoRestVersion = "latest";
-      public static readonly String AutoRestBootStrapperVersion = "autorest@2.0.4283";
-      public static readonly String AutoRestCmdExecuted = "cmd.exe /c autorest.cmd https://github.com/Azure/azure-rest-api-specs/blob/master/specification/cognitiveservices/resource-manager/readme.md --csharp --version=latest --reflect-api-versions --csharp-sdks-folder=D:\\Github\\azure-sdk-for-net\\src\\SDKs";
-      public static readonly String GithubForkName = "Azure";
-      public static readonly String GithubBranchName = "master";
-      public static readonly String GithubCommidId = "f58c2f349207bda6f5ca4c010dd7f56c38ddb70e";
-      public static readonly String CodeGenerationErrors = "";
-      public static readonly String GithubRepoName = "azure-rest-api-specs";
-      // END: Code Generation Metadata Section
   }
 }
-