Run ADPREP.EXE on all DCs or just the PDC emulator?

We have an AD forest, with a root domain and two child domains.  There are three DCs in the root domain, and two DCs in each of the two child domains.  All five of the DCs are Windows 2003 Server Standard.  I would like to get at least on of the DCs in the root domain upgraded to R2.  I want to use the Identity Management for Unix to authenticate my Debian Linux boxes against AD.  I know that I have to run ADPREP.EXE on the PDC emulator to extend the AD schema.  What I'm not clear on is whether or not I have to run ADPREP.EXE on all of the R1 DCs.

Thanks in advance,
Daris
jingalingAsked:
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LauraEHunterMVPCommented:
/forestprep needs to be run once per forest against the Schema Master.  /domainprep needs to be run once per domain against the Infrastructure Master.  Once per domain is all you need, you don't need to adprep every single DC.

Be sure you're using the version of adprep that's on Disc 2 of the R2 media, or you'll receive a "the versions of the schema don't match" error when you try to run it.

Hope this helps.

Laura E. Hunter - Microsoft MVP: Windows Server - Networking
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jingalingAuthor Commented:
Thanks.  
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