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Domain Migration

Posted on 2007-03-26
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Last Modified: 2013-12-05
I am faced with a problem, and want to see what everyone thinks. Currently we have our NetBIOS name for our domain as “COMPANY” and the AD Name for it “companycom”. In doing our migration I want migrate to “company.rootcompany.local” as the AD Name. The problem being is that I cannot have two NetBIOS domain names the same. Since they both would be COMPANY. Is there another solution other then making the second domain NetBIOS be like “COMPANY1” or something?
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Question by:wtstadd
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LauraEHunterMVP earned 250 total points
ID: 18795380
If both domains need to co-exist on the same network at the same time, then you will need to configure them with unique NetBIOS domain names.

If you are using Windows Server 2003 and you do NOT have Exchange deployed (any version), you can consider performing a domain rename to do a "staged" migration.  IE, migrate Company to Company1, then decomission the Company domain, and finally rename Company1 to Company after the original Company domain is no longer active.

A domain rename is not a "click, click, click done" process, but can be accomplished with a bit of planning and understanding. You'll find documentation on the process here: http://www.microsoft.com/technet/downloads/winsrvr/domainrename.mspx, I suggest familiarizing yourself with all of the documentation available there.  One caveat to the docs is this: there are some domain rename docs that tell you "sure, you can do a domain rename with Exchange 2003 installed" - don't you believe them, I've never seen it go well.

Hope this helps.

Laura E. Hunter - Microsoft MVP: Windows Server - Networking
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by:wtstadd
ID: 18795425
There is an Exchange 2003 Server in the Existing and there will be 4 Exchange 2007 Servers in the new one. I basically knew the answer but my boss wanted a second opinion. Thank you for such a quick and good response.
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by:wtstadd
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Thanks for confirming my answer.
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