Our exchange replication was not in sync with AD when we moved all our mailboxes and public folders over to Exchange 2003. Now we have a full AD site with Exchange 2003 and there are no more public folders or mailboxes on any of the Exchange 5.5 servers. However we still need to keep one last Exchange 5.5 server for an efax application, but it is only for the directory, no mailboxes are used. However because of the lack of sync with AD/Exchange 5.5 directory, the Exchange 5.5 recipients show many users who are in reality now located on Exchange 2003, but still show as if their mailboxes are on Exchange 5.5. AD is completely accurate, but the Exchange 5.5 directory is now. If I try to delete one of the Exchange 5.5 servers from the Exchange 5.5 admin app, I get the warning that any remaining mailboxes will be deleted.
My question is if Exchange 5.5 thinks there are still mailboxes on Exchange 5.5, if I delete a server will that cause any replication into AD and cause potential problems deleting real user mailboxes on Exchange 2003? We have the ADC running and SRS still operational. I just don't want to delete a server and then have a replication event happen and cause deletion of mailboxes on Exchange 2003. I know its probably not even a possability, but if anyone knows how this would work in theory, please get back to me.
One of my thoughts was to delete the Exchange 5.5 servers we don't need in AD using ADSIEDIT, since that would free up some of the MTA and small annoyances of leaving the Exchange 5.5 servers in the site. I could leave the required Exchange 5.5 server as is, and it won't know the difference. But the junk would be cleaned up from AD/Exchange 2003. Any thoughts?