Every user has a membership to one or several organization units.
If a user has a membership to a parent node he automatically has memberships to all sub organization units, including units added in the future.
This is shown like this (childs are checked and read only)
If a user has membership to all sub organization units below a parent organizaion we will not automatically get membership to units added in the future.
This is shown like this ( parent node party filled):
