functional level, you cannot return it to the Windows 2000 native domain
functional level.
You can use the Active Directory Users and Computers console to raise a domain’s domain functional level
by right-clicking the top of the tree and selecting
RAISE DOMAIN FUNCTIONAL LEVEL
from the pop-up
menu.
3.4.4 Domain Functional Levels
The Windows Server 2003 Active Directory supports three domain functional levels. Each level provides
varying compatibility with pre-Windows Server 2003 domains. The three functional levels are Windows
2000 mixed domain functional level, which is the default functional level in Windows Server 2003
domains and provides compatibility with Windows NT 4.0 domain controllers as well as Windows 2000
domain controllers; Windows 2000 native domain functional level, which provides compatibility only
with Windows 2000 domain controllers; and Windows Server 2003 domain functional level, which does
not provide compatibility with any pre-Windows Server 2003 domain controllers.
Note: You can raise a domain functional level but you cannot lower it. Thus,
once a domain is raised to the Windows 2000 native domain functional
level, you cannot return it to the Windows 2000 mixed domain functional
level and once a domain is raised to the Windows Server 2003 domain
|