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,