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I am trying to join 2 windows 2003 domains into a forest I get an error message that states the schema does not match run adprep.

Posted on 2008-10-23
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Last Modified: 2013-11-15
I am trying to join another domain controller into the active directory I get an error stateing the version of the schema source forest is not compatable run adprep. I have done this and still no results. DNS is working fine it sees the other domain but not allowing promotion
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Question by:lone_geo
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by:ckozloski
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Are these two different domains? Or two different servers in the same domain?
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by:lone_geo
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one is a dc the other is a member server I'm trying to promote to a dc.
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by:ckozloski
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Check this out. It may help:
http://support.microsoft.com/kb/917385
Make sure that you run the adprep tool from the R2 installation CD per the instructions of this kb otherwise you will still get the error.
If you still have problems, check this out:
 http://forums.techarena.in/active-directory/443681.htm
 
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by:ryansoto
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There is something different about the machines - Is your first domain controller standard 2ink3 and your soon to be DC R2 -
Is your first DC win2k and your new one win2k3....
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by:lone_geo
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trying the microsoft kb. and both servers running r2
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by:ckozloski
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Everything I have research points to an R2 schema problem. Your schema version should be 31. Pull up REGEDIT on the Primary Domain Controller (FMSO) and check this registry key: HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\NTDS\Parameters
The System Schema Version registry key should show a value of 31.
I would also check the schema version on your member server that you are trying to promote up. My guess is that the versions will show different between the two servers.
If it says 30, then you need to pull out your server installation disks and find Windows 2003 server R2 Disk 2. You will need to run the adprep command off of the cd from the command line. Pull up a DOS window on the server and change directory to <CD Drive>:\cmpnents\r2\adprep\adprep.exe /forestprep
Bottom line is the schema on both servers either needs to be 30 or 31.
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by:ckozloski
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Correction:
What I meant was:
Pull up a DOS window on the server and change directory to <CD Drive>:\cmpnents\r2\adprep
Run adprep.exe /forestprep

Pull up a DOS window on the server and change directory to <CD Drive>:\cmpnents\r2\adprep\adprep.exe /forestprep

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Thank you I have tried the adprep on both servers still a no go
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