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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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8 Comments
 
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Expert Comment

by:ckozloski
ID: 22787664
Are these two different domains? Or two different servers in the same domain?
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Author Comment

by:lone_geo
ID: 22787716
one is a dc the other is a member server I'm trying to promote to a dc.
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Expert Comment

by:ckozloski
ID: 22788005
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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LVL 24

Expert Comment

by:ryansoto
ID: 22788011
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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Author Comment

by:lone_geo
ID: 22795603
trying the microsoft kb. and both servers running r2
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Expert Comment

by:ckozloski
ID: 22796324
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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Assisted Solution

by:ckozloski
ckozloski earned 1000 total points
ID: 22796678
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

Open in new window

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Accepted Solution

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lone_geo earned 0 total points
ID: 22797808
Thank you I have tried the adprep on both servers still a no go
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