Connect-AzureAD failed with error message "An existing connection was forcibly closed by the remote host."

Hi Guys,

I have a customer who is using AzureAD module to access the AzureAD information. He is using the latest version of AzureAD module. When he executing cmdlet:

Connect-AzureAD -AzureEnvironmentName AzureCloud -Credential <cred>

It's failed with error message: 

System.Net.WebException: The underlying connection was closed: An unexpected error occurred on a send.

We got the error log from AppData, and get the detailed error message as follows:

2018-10-25T23:35:53.8456383ZError     InnerException                         System.Net.Http.HttpRequestException - An error occurred while sending the request..    at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.IdentityModel.Clients.ActiveDirectory.Internal.Http.HttpClientWrapper.<GetResponseAsync>d__31.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.IdentityModel.Clients.ActiveDirectory.Internal.WsTrust.MexParser.<FetchMexAsync>d__2.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.IdentityModel.Clients.ActiveDirectory.Internal.WsTrust.MexParser.<FetchWsTrustAddressFromMexAsync>d__1.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.IdentityModel.Clients.ActiveDirectory.Internal.Flows.AcquireTokenNonInteractiveHandler.<PreTokenRequestAsync>d__5.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.IdentityModel.Clients.ActiveDirectory.Internal.Flows.AcquireTokenHandlerBase.<RunAsync>d__57.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.IdentityModel.Clients.ActiveDirectory.AuthenticationContext.<AcquireTokenCommonAsync>d__37.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.IdentityModel.Clients.ActiveDirectory.AuthenticationContextIntegratedAuthExtensions.<AcquireTokenAsync>d__0.MoveNext()
2018-10-25T23:35:53.8456383ZError     InnerException                         System.Net.WebException - The underlying connection was closed: An unexpected error occurred on a send..    at System.Net.HttpWebRequest.EndGetResponse(IAsyncResult asyncResult)

We have checked the firewall is not block the AzureAD. Any suggestions, please? Thanks!

Thanks

-Justin