I received an email today from an Exchange admin who is testing 2013 Preview & is stuck with the error mentioned while running the 2013 Shell.
The detailed error is as follows.
VERBOSE: Connecting to server.domain.com.
New-PSSession : [server.domain.com] Connecting to remote server server.domain.com failed with the following error message : The WS-Management service does not support the request. For more information, see the about_Remote_Troubleshooting Help topic.
At line:1 char:1
+ New-PSSession -ConnectionURI "$connectionUri" -ConfigurationName Microsoft.Excha …
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : OpenError: (System.Manageme….RemoteRunspace:RemoteRunspace) [New-PSSession], PSRemotingTransportException
+ FullyQualifiedErrorId : WinRMOperationNotSupportedOnServer,PSSessionOpenFailed
Failed to connect to an Exchange server in the current site.
Enter the server FQDN where you want to connect.:
The fix is to run one of the prerequisite steps for installing Exchange 2013.
From an elevated command prompt, run the following.
%SystemDrive%\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_regiis.exe -ir –enable
IISReset
This step is required to register ASP.NET with .NET Framework 4.5 in Internet Information Services (IIS).
Exchange admins get all excited about installing the latest version and miss the steps 
