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DFS running on Windows Server 2003 and 2008R2

Posted on 2010-11-23
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Last Modified: 2012-05-10
We currently have Domain-based DFS running on two namespace servers (one running Windows Server 2003R2 x64 and the other Windows Server 2003R2 x86).

I would like to add a server running Windows Server 2008R2 x64 as an additional namespace server.  Are there any potential issues I should be aware of before adding this new server?
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Question by:Anthony Graczyk
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Krzysztof Pytko earned 250 total points
ID: 34197703
Nope, but you would be only able using this Windows 2008 DFS in Winodws 2000 mode (for earlier OS compatibility). When you remove all previous DFS servers based on 2000 or 2003 and your domain functional level will be raised to 2008 then you will be able using it in Windows 2008 mode.

That's the only limitation. Windows 2003 and 2008 can co-operate with DFS namespaces.

Regards,
Krzysztof
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by:Anthony Graczyk
ID: 34197897
The mode that you mentioned, is that shown somewhere?  Can this be manually changed or is it simply determined by the functional level of forest and domain?

Note:  I recently changed forest and domain functional level to 2003 after adding my first 2008R2 Domain Controller.
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by:Krzysztof Pytko
ID: 34198131
Yes, you can change it manually. But you need at least Forest level at 2003 mode and domain level at 2008 mode. Then you can migrate DFS namespace(s) to new Windows 2008 mode. If you have at least one older DFS server in your 2008 environment it is set up by default to Windows 2000 mode.

During namespace deloyment on 2008 server you will see 2 options (2000 and 2008 modes).

For extend your DFS knowledge in 2008 server, I would suggest this Microsoft article
http://technet.microsoft.com/en-us/library/cc732863%28WS.10%29.aspx

And this is also Microsoft article which explains how to migtrate old DFS namespace to Windows 2008 mode
http://technet.microsoft.com/en-us/library/cc753875%28WS.10%29.aspx

If you have further questions, do not hesitate to contact me :)

Regards,
Krzysztof
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