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adprep/forestprep must be run on the domain controller

Posted on 2011-09-17
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Last Modified: 2012-05-12
Hi EE,

I've already performed the below prep from the W2K with SP4 which is the existing DC.

adprep /forestprep
adprep /domainprep
adprep /domainprep /gpprep

I'm planning to migrate W2K domain controller into Windows 2008 Server x64 R2, then transfer the FSMO roles: But, when I ran the  'DCPROMO" from Windows 2008 Server x64 R2, a member server,  and add it as additional DC, it says that I need to run the "adprep /forestprep" in the domain controller. WHY??? I've already done the preps!



Virtual Network Environment:

DC = Windows 2000 server with SP4 with 32 bit O/S
Ran successfully  = adprep /forestprep; adprep /domainprep ; adprep /domainprep /gpprep using the Microsoft Windows Server 2008 Standard x64 Edition DVD

Memberserver = Windows 2008 server R2 with 64 bit O/S (Evaluation version)
Tried running DCPROMO to promote this member server as "additional domain controller"
BUT an error comes up " that adprep/forestprep must be run on the domain controller.

Any idea what's missing or needed to be done so the member server can be added as additional DC, before I transfer the FSMO roles ?

Thanks heaps in advance
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Question by:mcse2007
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Accepted Solution

by:
Mike Kline earned 250 total points
ID: 36555087
You need to run adprep32,  adprep from the Windows 2008 R2 disk is for 64 bit.

so just do the same thing you did bug use adprep32 (rest of the command is the same)

You can easily check your schema version using adfind http://www.joeware.net/freetools/tools/adfind/index.htm  great free tool

adfind -sc schvet

13 = windows 2000
30 = windows 2003
31 = windows 2003 R2
44 = windows 2008
47 = windows 2008 R2



Thanks

Mike
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Author Closing Comment

by:mcse2007
ID: 36555154
Thanks mike
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