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Have you run the ADPREP utility from your 2008 DVD yet? You have to run that so that your 2003 AD will have the upgraded Schema for the 2008 DC.<br />
run addprep /forestprep <br />
then <br />
run adprep /domainprep<br />
<br />
Look here for detailed info: <a href="http://www.petri.com/prepare-for-server-2008-r2-domain-controller.htm" rel="ugc">http://www.petri.com/prepare-for-server-2008-r2-domain-controller.htm</a>
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Have you run the ADPREP utility from your 2008 DVD yet? You have to run that so that your 2003 AD will have the upgraded Schema for the 2008 DC.
run addprep /forestprep
then
run adprep /domainprep

Look here for detailed info: http://www.petri.com/prepare-for-server-2008-r2-domain-controller.htm [http://www.petri.com/prepare-for-server-2008-r2-domain-controller.htm]

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Thanks for the quick response. Tried to research the answer but I difficulty finding the solution.
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Thanks for the quick response. Tried to research the answer but I difficulty finding the solution.

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Glad that my answer helped you &nbsp;troy!
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I am having a problem trying to access new 2008R2 DC from &nbsp;2003SP2 DC to transfer roles. When I try to attach to the 2008 server from AD schema in the console, I am getting a Login attempt failed. The domain controller could not be set.<br />
<br />
&nbsp;I can attach from the 2008 DC to the 2003 Server though. I did all the basic checks; DNS is in synch, time is correct on both servers. Everything looks good when running DCdiag and repadmin commands. Any help would be greatly appreciated.
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I am having a problem trying to access new 2008R2 DC from  2003SP2 DC to transfer roles. When I try to attach to the 2008 server from AD schema in the console, I am getting a Login attempt failed. The domain controller could not be set.

 I can attach from the 2008 DC to the 2003 Server though. I did all the basic checks; DNS is in synch, time is correct on both servers. Everything looks good when running DCdiag and repadmin commands. Any help would be greatly appreciated.

Problem trying to access new 2008R2 DC fro 2003 DC to transfer roles.

The Microsoft Legacy Operating System topic includes legacy versions of Microsoft operating systems prior to Windows 2000: All versions of MS-DOS and other versions developed for specific manufacturers and Windows 3/3.1, Windows 95 and Windows 98, plus any other Windows-related versions, and Windows Mobile.

Microsoft Legacy OS

The Microsoft Server topic includes all of the legacy versions of the operating system, including the Windows NT 3.1, NT 3.5, NT 4.0 and Windows 2000 and Windows Home Server versions.