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What is the correct procedure for migrating from Exchange 5.5 to Exchange 2003?

Posted on 2007-11-30
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I have an NT 4.0 server we'll refer to here on out as "OLD" running Exchange 5.5 with just under 95MB of space on it. I have a brand new server running Windows Server 2003 R2 Std Ed. we'll refer to as "SELHS02". I'd like to move all the mail duties from OLD to SELHS02 and am ready to install Exchange 2003 on SELHS02. What are the proper steps to take in this migration from beginning to end? I have a general idea of what has to happen but am apprehensive because I do not understand everything involved completely. I've heard of exmerge.exe - do I need to use that? Do I need to build a scratch box and load Server 2000 on it? Please help point me in the right direction and the first steps to take. Any help is much appreciated....
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Question by:selhs
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Sembee earned 250 total points
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Do you have Active Directory already?
If not then you will need that first.

You don't need to use exmerge unless you are dropping the domain and creating a new one.

Exchange 5.5 to Exchange 2003 is a supported migration path, IF you have the AD etc. Before you can install Exchange 2003 you will need to update the Active Directory Connector. I would suggest using the one from Exchange 2003 SP2 download as you will need to be on that version at some point anyway.

Otherwise you need to provide a lot more information. The process is documented in a lot of places, but if you think you will do it in a weekend, then you will need to think again, particularly if you don't have AD.

Simon.
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