adprep/forestprep & adprep/domain prep

If I have a child domain and forestprep was run in the parent domain, do I need to run it again in the child or do I only need to run domainprep?  I have read numerous conflicting articles online.  What is the correct method?
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You can not run adprep /forestprep in a child domain even if you tried. The adprep /forestprep must be run in the DC which holds the the Schema Master FSMO and there is only one of them in a forest and it is always in the root domain.


hope this helps
Schema Master can be placed in any DC in the forest, including a child domain DC.
Anyway, if the adprep /forestprep has already been run on the Schema Master, you get an error if you tried to run it again.
You can only run /forestprep once in the Forest - no need to run it again.

You WILL need to run /domainprep on each Domain in the Forest.  This is run from the Infrastructure Master (or should be) for each domain while logged in with minimum Domain Admin credentials.


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Windows Server 2003

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