mfd78

I'm new to all this and I am trying to play Operation Arrowhead multiplayer games but when I search for games to join, I get 95% DayZ games and about 10 OA hosts to join. I filter out the DayZ games but I'm obviously missing something. Of the 10 hosts I do see, on most I get a "You cannot play this mission, it is dependent on downloadable content that has been deleted..." message. Any assistance would be appreciated.