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Current domain functional level
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Specifies the current setting of the domain functional
level.
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Note |
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After you set this option 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.
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The functional level of a domain or forest defines only the set
of Windows operating systems that can run on domain controllers and
the set of available features. It does not define the client
operating systems that are supported in the forest.
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