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Adding Win2008 R2 Domain Controller to existing Win 2003 domain

At one of our remote offices, they have a single Win 2003 DC.  I wish to add a second DC there (for obvious reasons).

I'd like to add a Win 2008 R2 DC, but just want to make sure it will cooperate with the existing Win 2003 DC there.

I know I have to run the Win 2008 ADPrep but once done, if I DCPromo the new Win 2008 server, should I expect any issues?
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hamblid
Asked:
hamblid
2 Solutions
 
Charlie2012Commented:
As long as you do the adprep then no. You may want to revise your FSMO roles but not essential. My company have server 2008 running alongside 2003 domain controllers with no issues. Just make sure any log in scripts that rely on domain controllers have the new DC added.
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KCTSCommented:
There should be not issues - make sure you use ADPREP32 - the 32bit version on your Win2003 sever. Bring a Win2008R2 machine when you DCPromo it, then it will also assume the Global Catalog Role, which is no bad thing. You might also want to install DNS on the new DC - assuming its AD integrated DNS then it will replicate forom the existing server.
If you are using DHCP then you can also split the scope across the two machines to provide fault tollerance.
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Prashant GirennavarCommented:
Absolutely no issues.

  But you need to make sure that you run adprep commandline on respective FSMO roles Holder DC. Below is the guide which will explain step by step upgrade (Schema and Some Security ACL) procedure.

http://blogs.dirteam.com/blogs/sanderberkouwer/archive/2008/04/08/upgrading-your-active-directory-to-windows-server-2008.aspx

Thanks,

_Prashant_
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hamblidAuthor Commented:
All three answers were helpful, but last two had added detail.

Thanks for the help all!
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