After a link join is removed using the UI a locker entity retains attribute values that were previously contributed through the link. This outcome is highly undesirable, since the locker now has information that should not be there (in my case an AD samaccountname value which is misleading, since the the AD user's adapter entity join was removed in order to allow the adapter entity to rejoin to a different locker record, but now both locker records have the same samaccountname value!) There is no way to initiate removal of this out-of-date attribute data from the locker other than joining the locker to a different adapter entity (which may not be feasible) or performing a complete data reload from scratch (which is time-consuming and an outage). Running a baseline sync on the link does not fix the problem. The attribute values on the entity should be updated appropriately when the join is removed.
Customer support service by UserEcho