Tuesday, April 7, 2015

active directory - How can I replace the forest root domain with one of the child domains?

We have a Server 2003 functional-level forest with three domains:



NYC is the forest root domain




LAX is a child domain of NYC



SEA is another child domain of NYC



Some time in the distant past, someone decided that it would be best to retire the name NYC and starting putting everyone in the two child domains, LAX and SEA. NYC is still there, it just has no actual users, groups or shared resources.



Now we'd like to make LAX the forest root domain, and get rid of NYC entirely. SEA would remain unchanged and stay a child domain.



Is this possible? If so, how do I go about this process, assuming that nothing needs to be migrated away from the old NYC domain? Is it simply a process of removing all the DCs from NYC and decommissioning it, or is there more to it?




I haven't been able to find any relevant information on this process from Microsoft's resources. Please let me know if I can add any clarification, I'm still new to managing AD.

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