Exch 5.5 to 2k3 AD mixed mode

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Microsoft Exchange
I upgraded my NT4 domain to Win2k3 mixed mode. My Exch 5.5 server is on the old PDC which is now a downlevel DC in the mixed mode domain. I have two pure install win2k3 servers as dc's now, plus the old nt4 dc. I am trying to install my first Exch2k3 server into the domain and domainprep is telling me I need a native mode domain for some things to work. Do I need to convert my AD domain to native mode? If I do that, will it break Exch 5.5 on the BDC. I only have the one email server.
ASKED: September 5, 2005  2:52 PM
UPDATED: September 9, 2005  11:07 AM

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Thanks. We'll let you know when a new response is added.

This is why Exchange on a DC is generally a bad idea. Besides the obvious security concerns it limits your abilities to make changes to the server and the network at large.

You may want to look into a tool called UPromote it will allow you to demote the BDC to a member Server.

In direct answer to your question… moving to native mode won’t have much impact on the Exchange server but it would messy your domain structure. Replication would stop between AD and NT BDCs (bad)

Good luck

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