I know that Exchange 2010 can be run in a Windows 2003 domain but I'd like to run it in Windows 2008. I need to justify it though. Will I lose anything in Exchange 2010 if I only use it in a Windows 2003 active directory?
(I will have Exchange 2010 running on Windows 2008 R2 64bit.)
update: I'm not asking about domain controllers or running Exchange on a DC. I'm asking if my Active Directory is only at the level of 2003 and I run Exchange (on my 2008 server) in that domain, what do I lose? Or, in other words, if I put Exchange 2010 in a 2008 R2 domain, what advantage do I have in Exchange that I wouldn't have had if I had only used a Windows 2003 domain.