If you want to stop users from a UAA group of an existing UAA instance from using Historian Web-based Clients, you can remove the mapping between the UAA group of Historian and the existing UAA instance. If you want to stop integration between the Historian UAA and the existing UAA instance altogether, you must remove the mapping for all the groups of the UAA instance.
Mapping between the UAA groups of Historian and the existing UAA instance has been removed.