We’re planning to upgrade our AD from Win 2k3 to Win 2k8 R2.
When I tried to run DCPROMO on an 2008 R2 server, it reported the Forest needed ADPREP ran on it. Upon investigation I found out that I had ran ADPREP from a 2008 DVD, not an R2 version.
Is it because I ran the wrong version of ADPREP that we have this issue, or is there an underlying issue, although ADPREP ran without any errors and using ADSIEDIT I can see the relevant fields have been updated?
Sorry for the daft question, but is it ok to run the correct version of ADPREP, or will this cause issues? Or do I have to build a 2008 DC, promote that and then run the correct version of ADPREP?