WS03 Forest Functional Levels

Forest Functionality Enabled Features Supported DCs in domain
Windows 2000 Install from media

Universal Group caching

(For Windows Server 2003 DCs)		 Windows NT4

Windows 2000

Windows Server 2003

 
Windows Server 2003 Interim All Windows 2000, plus:

LVR replication

Improved ISTG

(For Windows Server 2003 DCs)

 Windows NT4

Windows Server 2003

 
Windows Server 2003 All Windows Server 2003 Interim, plus:

Dynamic aux classes

User to INetOrgPerson change

Schema de-/reactivation

Domain rename

Cross-forest trust

Partial GC Sync

 Windows Server 2003