Group Scope

Group scope	Group can include as members…	Group can be assigned permissions in…	Group scope can be converted to…
Universal	Accounts from any domain within the forest in which this Universal Group resides Global groups from any domain within the forest in which this Universal Group resides Universal groups from any domain within the forest in which this Universal Group resides	Any domain or forest	Domain local Global (as long as no other universal groups exist as members)
Global	Accounts from the same domain as the parent global group Global groups from the same domain as the parent global group	Member permissions can be assigned in any domain	Universal (as long as it is not a member of any other global groups)
Domain local	Accounts from any domain Global groups from any domain Universal groups from any domain Domain local groups but only from the same domain as the parent domain local group	Member permissions can be assigned only within the same domain as the parent domain local group	Universal (as long as no other domain local groups exist as members)