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Configuring 2003 server to additional domain controller of existing 2003 domain fails. Error: adprep needed

Posted on 2006-05-28
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Last Modified: 2010-04-18
Hi!

I have a running 2003 domain (with exchange 2003) on an exising x32 machine. It was installed from scratch (including creating new domain/forest) 2-3 years ago.

Now I want to replace it with a brand new machine, so my strategy is to add the new machine as an additional domain controller, and then remove the old machine.

The new machine is an AMDx64 based machine, so I'm running Win2003 R2 x64 on it.

I have set up the new machine as a member of the domain; but I'm still running DNS and WINS on the old machine.

However when I do the dcpromo it fails saying that "AD Installation Wizard cannot continue because the forest is not prepared for installing Windows Server 2003. Use the Adprep tool to prepare both the forest and the domain... This version of the AD schema of the source forest is not compatible with the version of the AD on this computer."

I have even tried to run adprep (from the 2003 R2 x32 distribution) on the old DC; but naturally it fails saying that it has already been run there (goes for both forestprep and domainprep). I have also tried running adprep on the new machine, but since the AD isn't installed there it fails (I didn't know if it still had managed to install the AD there, that's why I tried...)

I have full connectivity between the machines and no ports should be blocked. DNS resolving works prefectly and when I have tried to add AD I have tried both local and domain administrator accounts.

Anyone have any idea what the problem might be? My thoughts is that I shouldn't have to use adprep at all (since it's already an 2003 domain). One possibility to do a work around would prehaps be to install exchange on the new machine to get the AD installed there... but it would feel better to deal with one thing at a time...

Any help appreciated.

/Nicklas Kittelmann
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Question by:kittelmann
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Jay_Jay70 earned 1000 total points
ID: 16779243
Hi kittelmann,

not sure if i am understanding correctly have you run this

with windows 2003 R2 (release 2) you will need to run the adprep tools from the second cd supplied in the 2 cd set!

\CMPNENTS\R2\ADPREP

you can also download here
http://www.microsoft.com/downloads/details.aspx?familyid=5B73CF03-84DD-480F-98F9-526EC09E9BA8&displaylang=en

this boosts the schema up to cope with R2 functionality
http://www.microsoft.com/windowsserver2003/r2/whatsnewinr2.mspx

you need to run this on your current DC
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by:kittelmann
ID: 16779284
That most certainly did the trick!

I had only tried the adprep from disk 1... but with that other adprep it all started working!

Thanks a lot for the help, and you most certainly deserved the points!

/Nicklas Kittelmann
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by:Jay_Jay70
ID: 16781001
no worries, cheers :)
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