I recently upgraded my Active Directory 2003 to Server 2008 R2. Everything is migrated and running great, old Domain Controller has been decommissioned.
I went in to change my domain function level to Server 2008 but I noticed I have two options: Server 2008 and Server 2008 R2.
Which should I pick? My domain controller is Server 2008 R2.
EDIT: is there a big difference in functionaly from Server 2008 and Server 2008 R2 active directory? I have no plans of going back to anything before 2008.