The Manage and Unmanage commands are recursive. When you unmanage a session object, the interface and endpoint objects that are associated with the session object also become unmanaged. For example, if you unmanage an OSPFNeighborRelationship object, its two OSPFInterface objects and its two OSPFNeighborEndpoint objects also become unmanaged. All of the objects will have their IsManaged attribute set to FALSE.
Conversely, when you manage a session object that was previously unmanaged, the session object and its associated interface and endpoint objects become managed. All of the objects will have their IsManaged attribute set to TRUE.