The IDs of the records that were missing (e.g. did not exist in the portal) and so were not added or removed.
The IDs of the records that were removed from the list.
Static ReadonlyattributeStatic ReadonlydiscriminatorStatic Readonlymapping
The IDs of the records that were
added,removed, and/or found to bemissingas a result of the membership update request.