I am in the process of upgrading our network from 2008 to 2012.
I have 2 DC's at each site and all are running DNS as well. I have started demoting the current DC's to member servers( 1 at a time) and will be removing from AD. Dcpromo has worked fine and I have had no errors.
My 1st question is do I need to do any other cleanup in AD before I build the new DC's under 2012 as I mentioned I will be completely removing the old servers but I want to use the same names for the new DC's as the old one(s). Also they were all DNS servers so a similar question would be do I need to do any cleanup in DNS in order to add the new DC's with the same name(s).