Installing additional domain controller from Server 2008 to 2008 R2


I'm having an issue installing an additional domain controller on a Windows Server 2008 domain (server is 32bit). The new server is a server 2008 R2 (64bit)

I have tried to run the adprep /forestprep and adprep /domainprep on the current domain controller with the Server 2008 (32Bit) media but the message is coming up that the information has already been updated.

When I go to dcpromo the new server 2008 R2 it comes up with message saying that I need to run the adprep.  

The new server is part of the domain and this shouldn't be a replication issue as nothing has been run.

any ideas?


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Cliff GaliherConnect With a Mentor Commented:
And you are running adprep32.exe from the 2008 R2 media *on* the 2008 domain controller?  Can you post the specific output?
Dave RobinsonCommented:
As the new DC is running a 64 bit OS you will need the 64 bit media to run ADPREP.
Please run this using the correct media and then you will be able to DCPROMO.

Cliff GaliherCommented:
2008 R2 *does* include schema changes from 2008. So you must run adprep from the 2008 R2 media, not from 2008 media as you described.
superjohnbarnesAuthor Commented:
Ok. So tried running adprep from the 2008 R2 media on both servers.

2008 - unable to run due to compatibility (32 + 64bit)

2008 R2 - needs to be run on a DC error message
superjohnbarnesAuthor Commented:
running adprep /forestprep and adprep /domainprep

Just ran the adprep32 and that worked.

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