Exchange server dependent on each other
Posted on 2011-03-02
Exchange 2007 SP2 server (Hub, CAS, Mailbox roles)
Windows Server 2003 R2 SP2 (Secondary DC, Secondary DNS)
Exchange 2010 SP1 server (Hub, CAS, Mailbox roles)
Windows Server 2008 R2
I have recently introduced our Exchange 2010 to our environment with a few bumps along the way but all functions on the new server work without issue. I've migrated mailboxes and (so far) no complaints from our users.
It is now time to take the old exchange server down so I decided that before I do that, I should disconnect the old server from the internet/intranet and verify that I can still receive emails. As soon as I disconnect all copies of Outlook gave me a "disconnected" status even though the associated accounts are on the new server.
I know now I should have tested this before migrating but alas I didn't. I'm beyond nervous to uninstall Exchange 2007 and demote the server.
Is it normal for the 2 servers to be dependent on one another that if one is disconnected they all are? Or did this happen because the Exchange 2007 server also is a domain controller?
If they do rely on each other, will uninstalling affect the new server's ability to connect?
What problems will I theoretically be facing? Should I start drinking now?
Any help would be greatly appreciated.