I seem to remember that we borrowed a multi-user AE license for quite a while when we were running a training class for all of our AE users. Since it was in 1999 or 2000 I don't remember the exact time, but it was probably more than 30 days.
Tech support is pretty reasonable about lending licenses. Your success is their success.
-Andy \ / Andy Esslinger LM Aero - Tech Order Data ______-/\-______ (817) 279-0442 1 Lockheed Blvd, MZ 4285 \_\/_/ (817) 777-3047 Fort Worth, TX 76108-3916