Multi-campus management means that the system enables the client to use it whether it has one or more campuses or areas in it, by giving flexibility and additional options in managing it.
Exam authors also have the privacy and dependency they always needed if the exam was decentralized, then only authors and admins from this specific are will be able to view the exam based on their access roles.
Access control is a multi-campus enabled option, it lets the admin of the area manage his/her administrators, instructors and staff which keeps this area linked to the main account but independent in the management controls.