My company is a single forest and a single domain. My domain functional level is Win 2003.
My DCs are all Windows 2003 SP2. My member servers are mostly Win 2003 & 2008. I have couple Win 2012 and a few Win 2000 boxes left. My PCs are Win 7 and Win XP with a few Win 8/8.1.
My two part question is:
1) Any problems with me raising my FOREST Functional Level to Windows 2003?
(My research suggests I should have no issues.)
1A) If no problem, should I do it now OR wait until a little while prior to me raising my domain to Windows 2008R2?
(I am planning for late April-early May upgrade.)