Error when configuring SCIM Gateway

Attempting to post the following to AddSCIMGateway

{

"DisplayName":"SCIM Gateway",

"Comment":"",

"Extended":{

"Address":"http://40.118.23.253:59991/IdentityBroker",

"Audience":"",

"Tenant":"https://unifyb2cworkshop.onmicrosoft.com/",

"UserIdLookupField":"upn",

"UsersMappings":{

"AdapterId":"df97e04e-4d4c-475e-bf89-8a6c3f1b66d3",

"Mappings":{}

},

"GroupsMappings":{

"AdapterId":"e7db372f-a14d-4fdc-909b-2406b8b3f874",

"Mappings":{}}

}

}

Receive the following Error Response. Thanks in advance!

{
  "Message": "An error has occurred.",
  "ExceptionMessage": "Response status code does not indicate success: 404 (Not Found).",
  "ExceptionType": "System.Net.Http.HttpRequestException",
  "StackTrace": "   at System.Net.Http.HttpResponseMessage.EnsureSuccessStatusCode()\r\n   at Microsoft.Owin.Security.ActiveDirectory.WsFedMetadataRetriever.GetSigningKeys(String metadataEndpoint, TimeSpan backchannelTimeout, HttpMessageHandler backchannelHttpHandler)\r\n   at Microsoft.Owin.Security.ActiveDirectory.WsFedCachingSecurityTokenProvider.RetrieveMetadata()\r\n   at Microsoft.Owin.Security.ActiveDirectory.WsFedCachingSecurityTokenProvider..ctor(String metadataEndpoint, ICertificateValidator backchannelCertificateValidator, TimeSpan backchannelTimeout, HttpMessageHandler backchannelHttpHandler)\r\n   at Owin.WindowsAzureActiveDirectoryBearerAuthenticationExtensions.UseWindowsAzureActiveDirectoryBearerAuthentication(IAppBuilder app, WindowsAzureActiveDirectoryBearerAuthenticationOptions options)\r\n   at Microsoft.SystemForCrossDomainIdentityManagement.WebApplicationStarter.ConfigureApplication(IAppBuilder applicationBuilder)\r\n   at Microsoft.Owin.Hosting.Engine.HostingEngine.Start(StartContext context)\r\n   at Microsoft.SystemForCrossDomainIdentityManagement.Service.Start(Uri baseAddress)\r\n   at Unify.Product.IdentityBroker.SCIMGateway.StartGateway()\r\n   at Unify.Product.IdentityBroker.GatewayBase.Start()\r\n   at Unify.Product.IdentityBroker.GatewayNotifierDecorator.Start()\r\n   at Unify.Product.IdentityBroker.GatewayRepository.AddAndStart(IOperationalGateway gateway)\r\n   at Unify.Product.IdentityBroker.GatewayEngine.<>c__DisplayClass31_0.<ConfigurationChange>b__0()\r\n   at Unify.Framework.ExtensionMethods.WaitOnMutex(Mutex mutex, Action work)\r\n   at Unify.Framework.Notification.NotifierDecoratorBase.Notify(ITaskNotificationFactory notificationFactory, Action action)\r\n   at Unify.Product.IdentityBroker.GatewayEngineNotifierDecorator.Add(IGatewayConfiguration gateway)\r\n   at Unify.Product.IdentityBroker.GatewayEngineAuditingDecorator.Add(IGatewayConfiguration gateway)\r\n   at Unify.Product.IdentityBroker.GatewayController.InnerAddGateway[T](GatewayApiInformation`1 gatewayInformation, Guid gatewayId, XElement extended)\r\n   at Unify.Product.IdentityBroker.GatewayController.AddSCIMGateway(SCIMGatewayApiInformation gatewayInformation)\r\n   at lambda_method(Closure , Object , Object[] )\r\n   at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.<>c__DisplayClass10.<GetExecutor>b__9(Object instance, Object[] methodParameters)\r\n   at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ExecuteAsync(HttpControllerContext controllerContext, IDictionary`2 arguments, CancellationToken cancellationToken)\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\r\n   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n   at System.Web.Http.Controllers.ApiControllerActionInvoker.<InvokeActionAsyncCore>d__0.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\r\n   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n   at System.Web.Http.Controllers.ActionFilterResult.<ExecuteAsync>d__2.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\r\n   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n   at System.Web.Http.Filters.AuthorizationFilterAttribute.<ExecuteAuthorizationFilterAsyncCore>d__2.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\r\n   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n   at System.Web.Http.Filters.AuthorizationFilterAttribute.<ExecuteAuthorizationFilterAsyncCore>d__2.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\r\n   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n   at System.Web.Http.Dispatcher.HttpControllerDispatcher.<SendAsync>d__1.MoveNext()"
}