An additional method of manipulating default inheritance is to apply Block
Inheritance to a particular OU. With this setting configured on an OU it will not
inherit or apply any of the policies linked to its parent objects. The only exception
to this is the Enforce setting. Enforce will barrel through a Block Inheritance and
allow a policy to apply to objects within that OU regardless of the existence of
Block Inheritance. If you need to isolate a lower level OU from inheriting GPOs
from its parents, the easiest way to achieve this is via Block Inheritance. A w
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