Error opening Exchange Management Console

I recently had an issue at a client after we replaced their old domain controllers that were running Windows Server 2003 with a pair of brand new 2012 R2 servers.  I upgraded the domain and forest functional level to 2012 R2 and decommissioned the old servers.  However later in the day I noticed issues getting into the Exchange Management Console on their Exchange 2010 server.  I would receive the following error message

“An error caused a change in the current set of Active Directory server settings.  Restart the Exchange Management Console.”

EMC AD Change Error

After performing some investigation I found out the fix was very easy.  Simply delete the file below

C:\Users\%username%\AppData\Roaming\Microsoft\MMC\Exchange Management Console

You should now be able to open the EMC without an error.

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