when executed a powershell 2.0 command using vb.net to add mailbox to MS Exchange 2010 having WinRM client and server machines as same machine, i encountered the following error.



"The WinRM client cannot process the request. The authentication mechanism requested by the client is not supported by the server or unencrypted traffic is disabled in the service configuration. Verify the unencrypted traffic setting in the service configuration or specify one of the authentication mechanisms supported by the server. To use Kerberos, specify the computer name as the remote destination. Also verify that the client computer and the destination computer are joined to a domain. To use Basic, specify the computer name as the remote destination, specify Basic authentication and provide user name and password. Possible authentication mechanisms reported by server: For more information, see the about_Remote_Troubleshooting Help topic."



Environment i am using is

Windows Server 2008 R2 64-bit

MS Exchange 2010

PowerShell V2.0

I had a similar issue. Mine was due to the fact that WinRM was listening on a non-standard port.

you could run the following command to see where WinRM was listening:

winrm enumerate winrm/config/listener

Then when connecting specify the -port parameter