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Daryl Khan

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Raising Forest Functional Level

I'm getting the following error when trying to raise forest functionality on a Server 2008 R2 server.

you cannot raise the forest functional level.
either this forest includes domain controllers that are not running the appropriate version of Windows,
or one or more domains in the forest are still at Window 2000 mixed functional level or Windows Server 2003 interim

Current Forest Level
Windows Server 2003

We also run a Server 2003 domain controller alongside the 2008.  I've followed steps online as per the link below:

Can anyone provide any advice on how to get around this?

Windows Server 2003Domain ControllerActive Directory

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Daryl Khan

8/22/2022 - Mon