A while back when I first started with my company, the domain had already been set up using a "xxx.net" DNS name for the internal AD namespace. The shortname is just fine and I feel no need to change it but I have always hated how we used an internet DNS name for our internal AD. We are planning an AD upgrade from 2003 to 2008R2 and I would like to work this DNS name change if possible.
I know there are procedures for doing a full domain name change but my question is: Is a FULL domain name change neccessary if all I want to change is the internal DNS name of the domain? Would it be better to do this change after the 2008R2 domain upgrade?