I noticed that the recent content update removed the ability that we had to set privacy settings for our multiplayer lobbies, so now we can’t set our lobbies to invite only. Previous Halo titles gave the ability to set privacy settings to Open, Friends Only, Invite Only, and Closed. You could also set a maximum party size such as 10 players. When MCC launched we were restricted to choosing Friends Only or Invite Only without the ability to set a maximum party size, which frustrated many custom games hosts such as myself. Now the recent patch has it assumed to be Friends Only all the time. The patch didn’t even attempt to do anything to help custom games (hosted for 3 hours last night, no improvements), and yet they somehow managed to make the custom games experience even worse than it already was.
I can switch between friends only, and invite only. When in the lobby hit X, The “my game session” should be highlighted. Just select it and you can toggle between friends only and invite only.