Domain/Forest Functional Level

I have a Windows 2003 Forest with a Forest Root Domain, and 3 child domains.
Can I upgrade the forest root to windows 2008 functional level but leave the
other domains at 2003? What do I need to do with the Forest functional level?
I would like to take advantage of the enhanced features of DFS on W2k8 R2 but
I need the domain functional level to be upgraded.

CK wrote:
> I have a Windows 2003 Forest with a Forest Root Domain, and 3 child
> domains. Can I upgrade the forest root to windows 2008 functional
> level but leave the other domains at 2003? What do I need to do with
> the Forest functional level? I would like to take advantage of the
> enhanced features of DFS on W2k8 R2 but I need the domain functional
> level to be upgraded.

You need all 2008 (+) DCs in the domain to raise to DFL 2008. The forest
functional levl (FFL) can't be any higher than the lowest Domain Functional
Level. So if your root has all 2008 DC's you can raise the root domain
fiunctional level to 2008 but must keep the forest functional level at or
below the lowest child domain functional level.

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/kj