Ability for the GUP to update its content cache from Symantec LU if SEPM goes offline

If the SEPM goes down, the GUPs are unable to update its content cache which in turn affects the clients as well. You can set a policy for the clients to update from external LU but this would saturate the network. It would be nice if the GUP can get all the necessary updates from Symantec LU to distribute to clients.