Originally Posted by
pinniped
I've gotten nice upgrades even when I've been master-billed, but it was a case where the event was so large that we had basically taken over the hotel. A smaller tour group might be getting a block of rooms that they aren't upgrading out of.
For the best chance, phone Marriott and get your Bonvoy number added ahead of time. As others have stated, no points...but maybe someone will notice your status and upgrade you. (I have no idea how many suites a LM in Egypt has to begin with.)
I'm not sure Marriott will have the info on a master billed account. OP may need to contact the hotel. And, its my sense that in some cases the tours book XX rooms and that the tour company collects XX keys to distribute so the hotel may not have your name in this situation.