Forest Funtion Level/Domain Function Level -- Trusts

I want to setup a trust between two forests. One forest is running 2000 Mixed mode Domain/Forest Function level

The new one is running 2008R2 Forest/Domain Function Level.

When creating a trust, what are the requirements for the function levels ? Was looking at Microsoft site/google, but couldn't find.
TDAENCAsked:
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Krzysztof PytkoConnect With a Mentor Senior Active Directory EngineerCommented:
To be able to establish Forest trust between these forest you need to have at least Windows 2000 native mode (because 2008 doesn't support NT4 domains)

Regards,
Krzysztof
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gaurav05Connect With a Mentor Commented:
Hi,

Are both forests single-domain? If so, you don't
need to worry about creating a forest trust as it would have no
additional benefit anyway. A forest trust is useful when you have
two multi-domain forests and you want all domains in one/both forests to be trusted.
If it's two single domain forests, then an external trust will do the
same job as a forest trust anyway. You wouldn't have to raise/lower functional
levels to create an external trust. Create a two-way external trust and this should
allow the migration.
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Krzysztof PytkoSenior Active Directory EngineerCommented:
Windows 2000 native mode of Domain Functional Level, FFL can still be at Window 2000 mode.

Krzysztof
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PberSolutions ArchitectCommented:
This question has been classified as abandoned and is closed as part of the Cleanup Program. See the recommendation for more details.
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