Close EMC

%appdata%\Roaming\Microsoft\MMC\Exchange Management Console\
Delete the files: Exchange Management Console and Public Folder Management Console


In the registry under: HKCU\Software\Microsoft\Exchangeserver\v14\AdminTools\NodeStructureSettings delete the value NodeStructureSettings

http://tomtalks.uk/2011/11/exchange-management-console-pointing-to-wrong-server-the-attempt-to-connect-to-httpserver-domain-compowershell-using-kerberos-authentication-failed