On the Redstor Pro Storage Platform, a backup administrator at collection level can create other collection-level backup administrators within the same collection. For example, SubCollectionB administrator, john.smith, can create another administrator "dave.jones" with the same rights as himself. Both john.smith and dave.jones can then create other non-admin "View Only" and "Group Admin" users within the groups of SubCollectionB.
If either administrator tries to change the other's password, they encounter an error:
"Server returned a fault exception:  A collection group admin may not create a top level admin user."
Whilst the error message is misleading and refers to a "top level admin user", the actual problem is that collection-level administrators are not able to reset each other's passwords.
If a password reset is needed, contact the top-level backup administrator for the Storage Platform and they will be able to reset the collection-level administrator's password.