Last year, we moved from a windows 2000 AD to windows 2008, but never raised the domain functional level from 2000 native.
We have since upgraded our 2 windows 2008 DC's to R2. I would like to raise the functional level to 2008 R2. Lest year we ran the adprep's to get the domain ready for the 2008 DC's. Do I need to do that again in order to prep the domain for raising functional level to R2?