I currently have a mixed environment of Windows 2003 R2 and Windows 2008R2 running Active Directory Services. I also have a 2003 R2 with Exchange not running AD. My functional forest and domain level is currently set to 2000. I am assuming I can elevate this to 2003 with no problems.
I hope to decommission my 2003 R2 AD server in the next few months leaving only the 2008 R2 servers running AD. At this time, can I elevate the functional level to 2008 even though I have the 2003 R2 server running Exchange with no AD?