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the steps of remove an exchange server from AD.

Posted on 2007-11-28
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Last Modified: 2008-03-18
We have an exchange server which is also a domain controller. Now it is ready to get rid off it. (FSMO has been transferred to new DC, and all mailbox and public folder has been moved to new exchanger server already)

Which one should I do first? Demote a DC first or remove exchange server first?

Thank you very much for the help
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Question by:bostonconservatory
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by:-DJL-
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Uninstall exchange first then demote the DC.
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by:tigermatt
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You must never change the Domain Controller role of a server whilst the server has Exchange installed. Doing so will break Exchange, since Exchange on a domain controller is actually a slightly different environment to Exchange on a member server.

You should do the uninstall of Exchange first, reboot the machine 2 - 3 times to make sure Exchange is gone, then you should be safe to run dcpromo and remove the DC role of the server. You would then have a member server which you could either format and reinstall or simply use as a member server, or whatever else you intend to use it for. You could even reinstate it as a DC once Exchange is gone, but I would be looking at formatting first.

-tigermatt
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by:killbrad
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Shouldn't make any difference, but I would probably uninstall Exchange first if I was doing it....
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by:-DJL-
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"You can run Exchange Server 2003 on either a member server or on a domain controller. After you install Exchange Server 2003 on a server, do not change the role of the server. For example, if you install Exchange Server 2003 on a member server, do not use the Dcpromo tool to promote the server to a domain controller. Or, if you install Exchange Server 2003 on a domain controller, do not use the Dcpromo tool to demote the server to a member server. Changing the role of a server after you install Exchange Server 2003 may result in loss of some Exchange functionality and is not supported. "

http://support.microsoft.com/kb/822179

-> Uninstall exchange first then demote the DC
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by:tigermatt
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>>> Shouldn't make any difference, but I would probably uninstall Exchange first if I was doing it....
You cannot do this - -DJL- has provided a reference to a Microsoft article which describes this.

-tigermatt
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by:killbrad
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He isn't planning to use the server as a DC  -OR-  to host Exchange on anymore, so it really makes no difference which order he does it in.  

If he uninstalls Exchange after he demotes the DC, just as long as the old Exchange server was never part of the old Exchange organization, then there is no real issues.  

Microsoft also says you shouldn't even run Exchange on a domain controller.  full stop.
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killbrad earned 50 total points
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err, should read: "just as long as the old Exchange server was never part of the NEW Exchange organization, then there are no real issues. "

me speaks good.

No argument with the guys above, uninstall Exchange first before demoting your DC, as I think we have all said.  Thats about it!

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by:tigermatt
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Did the solutions provided by myself and DJL not help you too?
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by:tigermatt
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bostonconservatory?
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