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Domain Functional Level

Posted on 2013-02-06
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I have a Windows 2008 domain & all of my domain controllers are Windows 2008. Currently the domain functional level is Windows 2003. I'm in the process of setting up DFS in this domain but before I start using DFS I'd like to raise the domain functional level to Window 2008. My question is, when I raise the functional level to Win 2008, do I need to do this to all of my domain controllers or just on one of them? Or do I need to make this change on the RID operations master or which FSMO role holder should I make the change on? Any suggestions or comments are welcome.
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Question by:wantabe2
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Ben Hart earned 1200 total points
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Once you raise the functional level.. it is raised for the domain.. not for the server.  I believe you can make the change on any dc actually.. it does not have to happen on a particular role holder.
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by:Sandeep
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Yes if you want to raise Functional level then you can do it from Domain for all DCs. I would prefer to do this from the server which is holding FSMO Roles or most probably Primary Domain Controller.

Also I believe once you raise Domain Functional Level you cannot revert to previous version.
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by:Ben Hart
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No you cannot 'downgrade' to a lower level.  Do it from whatever server makes you feel good, it won't affect the out come in the least :)

Something else you cannot do once raised, install a DC using a lower level OS version, but you knew that already.
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by:wantabe2
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thanks
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