Forest functionality enables features across all the domains within your forest. Two forest functional levels are available: Windows 2000 (which supports domain controllers running Windows NT 4, Windows 2000, and Windows Server 2003) and Windows Server 2003 (which supports only domain controllers running Windows Server 2003). If you are upgrading your first Windows NT domain so that it becomes the first domain in a new Windows Server 2003 forest, you can choose an additional forest functional level (Windows .NET interim).
By default, forests operate at the Windows 2000 functional level. You can raise the forest functional level to Windows Server 2003. Once the forest functional level has been raised, domain controllers running earlier operating systems cannot be introduced into the forest.
Table 16-2 describes the forestwide features that are enabled for the corresponding forest functional levels.
Forest Feature | Windows 2000 | Windows Server 2003 |
---|---|---|
Global catalog replication tuning | Disabled | Enabled |
Defunct schema objects | Disabled | Enabled |
Forest trust | Disabled | Enabled |
Linked value replication | Disabled | Enabled |
Domain rename | Disabled | Enabled |
Improved replication algorithms | Disabled | Enabled |
Dynamic auxiliary classes | Disabled | Enabled |
InetOrgPerson object class change | Disabled | Enabled |
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