I had to change the logon name of a helpdesk account that was used to manage Exchange 2010 mailboxes for management reasons and now it's getting errors when trying to log into the EMC.
Error is as follows
The following error occurred when retrieving user information for 'DOMAIN\username':
The operation couldn't be performed because 'UBD\username' couldn't be found.
Just to point our, our NetBIOS name does not have a '.' and I've tried to use disk cleanup in the mmc console and deleting the old user profile. Logging into another machine does not work. Removing the user from the Exchange management roles group and adding it back doesn't help either.
I've tested this with the Exchange admin account and get the same error.
I've tested the rename on a different Exchange org and it works after a logon name change so I suspect it has something to do with the config.