When location data security is set to "On" for an organization and the user's location has been assigned additional location access to a location, the user can view and maintain all cases and clients in their own location as well as the additional location and all the child locations of the location. An administrator may also choose to apply the additional location access to all sub-locations, and if so then users in sub-locations of the location granted access can also view and maintain all cases and clients in their own location as well as the additional location. If the user only has read rights for the additional locations then they will only be able to view cases and client information in the additional locations.
This could apply to a location such as a call center. For example, users in a call center location may require additional access to other locations within the organization. An administrator can assign additional location access to these call center users. Users would then gain rights to the additional locations and any child locations of the additional locations, unless a child location was specifically removed from the list of locations to which a location was being granted access. If a user holds two positions in two different locations, both locations would be considered that users location and as such the user would have access to information in both locations.