Adding Windows Server 2003 R2 to a Windows Server 2003 domain as an additional DC.

Hi there
I have two sites A and B
site A has 4 Windows 2003 Servers with SP1. 2 of these are domain controllers and one of them is an Exchange 2003 server.
site B has a Windows 2003 Server R2 that I'm trying to promote to being a DC for this domain in site B.

I get this error message:

The operation failed because:

The Active Directory Installation Wizard cannot continue because the forest is not prepared for installing Windows Server 2003. Use the Adprep command-line tool to prepare both the forest and the domain. For more information about using the Adprep, see Active Directory Help.

"The version of the Active Directory schema of the source forest is not compatible with the version of Active Directory on this computer."

Would it corrupt my schema if I run adprep / forestprep on my Windows 2003 domain?
eggster34Asked:
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Jay_Jay70Commented:
Hi eggster34,

to add a R2 DC into your network you will need to run forest prep from the I386 folder on the R2 cd.... this extends it for R2 features and wont corrupt anything :)

Cheers!
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eggster34Author Commented:
ok. please give me your address so that I can come and cry in front of your door if it does corrupt it :)))
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Jay_Jay70Commented:
not a problem!

youc an run the adprep tools however many times you want   doesnt cause you any grief!
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TheCleanerCommented:
Actually Jay is right but I think the ADPrep is on the 2nd CD under a "components" folder (just do a file search for adprep*)

For confirmation of Jay's statement:

http://www.experts-exchange.com/Networking/Q_21733690.html
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Jay_Jay70Commented:
ah my bad! Thankyou Cleaner
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eggster34Author Commented:
many thanks. it worked when I ran the one on the components folder..
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TheCleanerCommented:
Thanks for the points.
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Jay_Jay70Commented:
cheers
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