Question : adprep for a 2008 r2 server

I have a windows 2008 R2 standard server that I want to dcpromo. When I try I get prompted to run adprep/forest prep. I already have two 2008 servers service pack 2 64bit as dc's along with a windows 2003 server

Answer : adprep for a 2008 r2 server

Let things settle before demoting later today run dcdiag to check for any errors.

Once you are sure that is working then you can demote the server.

Here is how you raise the levels.

http://www.petri.co.il/raising-windows-server-2008-active-directory-domain-and-forest-functional-levels.htm