Assigning UNSGroupB to another UNSGroupB doesnt inherit memberships?

There is no inheritance in place that duplicates the memberships when you do group nesting. This works the same as in AD, just because you have group nesting it does not mean that the group memberships will be duplicated.

If you really need to duplicate the memberships implicitly, you have to implement that yourselve via a custom process chain/script combination I propose.

So in that case, I would be curious to know what is the benefit of group nesting?

Speaking generally, with group nesting you reduce the number of group memberships in each of the groups but are flexible enough to use a single parent group in ACLs like on file level permissions. At least this is the common scenario in Active Directory and the Windows file permissions.

Speaking generally, with group nesting you reduce the number of group memberships in each of the groups but are flexible enough to use a single parent group in ACLs like on file level permissions. At least this is the common scenario in Active Directory and the Windows file permissions.