We worked on a exchange 2003 to 2010 migration at a client. All was going well at about 90 percent into the process ( mailboxes and mail were all moved over) our 2008 R2 VM ended up crashing and we had to end up reverting back to using the old 2003 exchange machine by restoring old mail from backups etc.
so we went back into AD used ADSIedit and cleaned up the failed server etc.
But i see in 2003 exchange manager the Exchange administrative group that was created with the 2010 failed server is still in the 2003 server. and that old server is still listed in there.
what is the proper way to remove this? do i need to remove it before i start another attempt at a migration to a new 2010 exchange server?
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