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ADPREP 32bit ran with success but still having error to run ADPREP.

Posted on 2013-11-28
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Last Modified: 2013-11-29
On our 2003 server I ran ADPREP from 2008 32bit with no issues and success at the end, Ran ADPREP /forestPrep, Ran ADPREP /domainPrep.

Running DCPROMO on 2008 R2,
-existing domain
-add DC to existing
-set credentials
-picked our doamin (forest root domain)

Then I am getting the famous message  "To install a domain controller into this active directory forest you must first prepare the forest using ' adprep /forestprep. the adprep utility available on the windows server r2 installation media in the support\adprep \ folder."

objectVerison 44 is what returns after running dsquery
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Question by:burkem3434
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Mahesh earned 500 total points
ID: 39684889
AD schema is having different version in 2008 and 2008 R2
U must upgrade schema to introduce 2008 R2 domain controllers in 2003 \ 2008 domains
If you want to deploy 2008 R2 DCs in 2003 domain with 32-bit 2003 OS,
then you must need to run below commands on 32-bit 2003 server from 2008 R2 DVD
adprep32 /forestPrep
Adprep32 /domainPrep
Adprep32 /domainprep /Gpprep

OR

You can add windows 2008 R2 member server in 2003 domain, install Active Directory tools (RSAT) and then run below commands from 2008 R2 server (through 2008 R2 DVD)
adprep /forestPrep
Adprep /domainPrep
Adprep /domainprep /Gpprep

Schema version for 2008 R2 is 47
2008 R2 have two executables, Adprep is 64bit version and Adprep32 is 32bit version.
64bit version (ADPrep) cannot be executed on 32-bit OS.
Mahesh
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Author Comment

by:burkem3434
ID: 39685207
It was one of those working too long and too late tunnel vision goofs.

I had already run with success (at least  I believed so).
adprep /forestPrep
Adprep /domainPrep
Adprep /domainprep /Gpprep

Turned out I was using the 2008 32 bit DVD. I ran from the 2008 R2.
adprep32 /forestPrep
Adprep32 /domainPrep
Adprep32 /domainprep /Gpprep

Worked out perfectly. Thank you!
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