Connecting to remote server failed with the following error message: The WinRM client cannot process the request. It cannot determine the content type of the HTTP response from the destination computer. The content type is absent or invalid. For more information, see the about_Remote_Troubleshooting Help topic.
also you can find the following error in event viewer:
Log Name: Application
Date: 01/24/2014 6:18:18 AM
Event ID: 2280
Task Category: None
The Module DLL C:\Program Files\Microsoft\Exchange Server\V14\Bin\kerbauth.dll failed to load. The data is the error.
This issue appear, when you are reinstalling the exchange server on different path, which will lead the powershell virtual directory model in IIS pointing to an incorrect path.
Go to C:\Windows\System32\inetsrv\config\applicationhost.config, change the kerbauth path to the correct one.
After changing path, restart the EMC and you can successfully open the Exchange 2010 EMC.