mixed (default)
Supported domain controllers: Microsoft Windows NT 4.0, Windows 2000, Windows Server 2003
Activated features: local and global groups, global catalog support
Windows 2000 native
native
Supported domain controllers: Windows 2000, Windows Server 2003
Activated features: group nesting, universal groups, SidHistory, converting groups between security groups and distribution groups, you can raise domain levels by increasing the forest level settings
interim
Supported domain controllers: Windows NT 4.0, Windows Server 2003. See the "Upgrade from a Windows NT 4.0 Domain" section of this article.
Activated features: Windows 2000 features plus Efficient Group Member Replication using Linked Value Replication, Improved Replication Topology Generation. ISTG Aliveness no longer replicated. Attributes added to the global catalog. ms-DS-Trust-Forest-Trust-Info. Trust-Direction, Trust-Attributes, Trust-Type, Trust-Partner, Security-Identifier, ms-DS-Entry-Time-To-Die, Message Queuing-Secured-Source, Message Queuing-Multicast-Address, Print-Memory, Print-Rate, Print-Rate-Unit
Windows Server 2003
Supported domain controllers: Windows Server 2003
Supported features: domain controller rename, logon timestamp attribute updated and replicated. User password support on the InetOrgPerson objectClass. Constrained delegation, you can redirect the Users and Computers containers
Raise the Domain Functional Level for 2008 server Applies To: Windows Server 2008, Windows Server 2008 R2 When you install Active Directory Domain Services (AD DS) on a server running Windows Server 2008 R2, a set of basic Active Directory features is enabled by default. In addition to the basic Active Directory features on individual domain controllers, there are new domain-wide and forest-wide Active Directory features available when all domain controllers in a domain or forest are running Windows Server 2008 R2. For the new domain-wide features to be enabled, all domain controllers in the domain must be running Windows Server 2008 R2, and the domain functional level must be raised to Windows Server 2008 R2. Membership required: Domain Admins or Enterprise Admins To raise the domain functional level 1.Open Active Directory Domains and Trusts. To open Active Directory Domains and Trusts, click Start, click Administrative Tools, and then click Active Directory Domains and Trusts. 2.In the console tree, right-click the domain for which you want to raise functional level, and then click Raise Domain Functional Level. 3.In Select an available domain functional level, do one of the following: * To raise the domain functional level to Windows Server 2008, click Windows Server 2008, and then click Raise. * To raise the domain functional level to Windows Server 2008 R2, click Windows Server 2008 R2, and then click Raise. Caution Do not raise the domain functional level to a later version (such as Windows Server 2008 or Windows Server 2008 R2) if you have or will have any domain controllers running earlier versions of Windows Server. Important After you set the domain functional level to a certain value, you cannot roll back or lower the domain functional level, with one exception: when you raise the domain functional level to Windows Server 2008 R2 and if the forest functional level is Windows Server 2008 or lower, you have the option of rolling the domain functional level back to Windows Server 2008. You can lower the domain functional level only from Windows Server 2008 R2 to Windows Server 2008. If the domain functional level is set to Windows Server 2008 R2, it cannot be rolled back, for example, to Windows Server 2003.
The functional level that only allows Windows Server 2003 and Windows Server 2008 domain controllers is the Windows Server 2003 functional level. At this level, the Active Directory domain can utilize features introduced in Windows Server 2003 while maintaining compatibility with the earlier Windows 2000 domain controllers. However, it does not support any domain controllers running versions newer than 2008.
Windows 2000 Mixed: This is the default functional level
What are the domain functional level in Windows Server 2003
Windows 2000 mixed is the default
Users.
yes it is
Windows Server 2003 interimSupported domain controllers: Windows NT 4.0, Windows Server 2003Supported features: There are no domain-wide features activated at this level. All domains in a forest are automatically raised to this level when the forest level increases to interim. This mode is only used when you upgrade domain controllers in Windows NT 4.0 domains to Windows Server 2003 domain controllers.
IF it is the first dc in a forest the level will be 2003
only 2008 servers
only 2008 servers
Functional levels