Windows Server 2003 R2 AD Replica Problems

Hi All,

I'm having trouble deploying a replica DC in my AD infrastructure. Currently we only have one DC and I'd like to have some sort of redundancy in the event it goes down.


We have an Windows Server 2003 R2 DC with AD installed. We extended the schema for Exchange 2010.

I'd like to run dcpromo and replicate the AD infrastructure to the new Replica DC, but I keep getting an error telling me the versions are incompatible. What are the steps I need to take to properly replicate the AD information to the new DC? Is it is a simple as running adprep? If so what version (from the exchange disc or the Windows server 2003 R2 disc?).

Thanks in advance for any information you can provide.

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Mike KlineCommented:
What is the OS on the server you are trying to promote?   For a 2003 R2 box you use adprep from disc 2  in the \cmpnents\R2 folder

...but if you already have a 2003 R2 DC you should already be at the right schema version

Can you download adfind  (want to see what version your schema is at)

run  adfind -sc schver

47 = 2008 R2

44 = 2008

31 = W2K3 R2

30 = W2K3

mattaiAuthor Commented:
The response was 30, which is w2k3 .... hrm.
mattaiAuthor Commented:
Huh. I just realized my originating DC is 2003 (no r2). I guess that would explain the problem... i thought it was R2. Is there an easy way to upgrade this?
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Mike KlineCommented:
yeah just use the adprep from the R2 disc 2 set and once you finish the prep you should be good to go to add the 2003 R2 box as a DC more info here
Locate the version of Adprep, either in the \cmpnents\R2 folder of the Windows Server 2003 R2 Disc 2 or from Microsoft hotfix 919151, that is compatible with the version of Windows that runs on your schema master.



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mattaiAuthor Commented:
nice. thanks.

so just to recap:

DC: Runs Windows Server 2003 SP1
Replica DC: Runs Windows Server 2003 R2.

I run the adprep tool from the R2 disk on the 2003 SP1 server and extend the schema. I then attempt to set the second server up as a replica once again.
Mike KlineCommented:
Yeah you have the steps down there.

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