This topic covers the Active Directory features that are provided by different versions of Windows Server, beginning with Windows Server 2003. Except where noted, these features are available on the domain controllers that run the corresponding version of Windows Server regardless of the functional level of the domain or forest. There are additional features that are available at various functional levels. For more information about functional levels, see Understanding Active Directory Domain Services (AD DS) Functional Levels.
Maheshkumar S Tiwari edited Revision 12. Comment: Added tags
Mike Kline edited Revision 10. Comment: Added Windows Server 2012 R2 Section, definitely more to come here
Mike Kline edited Revision 8. Comment: Added 2008 R2 bridgehead server selection improvments
Justin Hall MSFT edited Revision 4. Comment: Added link to AD LDS per Paul
Nice article Justin.