Exchange Management Console – Initialization failed after renaming/removing a server
After renaming a server and reinstalling Exchange 2010 i got the following error while launching EMC: The following error occurred while attempting to connect to the specified Exchange server ‚<OLD SERVERNAME’.
The problem was that EMC still tries to connect to the old server name, and I found no option to specify the new one.
So I looked around in the Registry and TaTa, there is one value which still includes the old value. Just too bad that it’s a Binary value. So if you want you can also just rename the server to the new and right value. The easier solution (which I did) is just deleting the value “NodeStructureSettings“.
BTW: It’s within the following Hive: HKCU\Software\Microsoft\Exchangeserver\v14\AdminTools
After firing up EMC again it will discover the local Exchange Installation again and running fine again J
BTW: With EMS (àPowerShell) you won’t get this error 
Thanks a bunch for this posting. I had been searching for this answer for a few days and I ran in to your posting this morning and it worked perfectly.
Thanks a lot for this posting. Perfect solution after remove Exchange 2010 CAS server.
Thanks your post, it solved my problem 2!
Your article helped me a lot. I was whacking my head trying the find the key.
Good man!!