Visceralfusion

So back in the old Arma 2 days, I remember there being Client downloaded mission files whenever a client were to join a new server and before the server would launch you would sit through a loading screen where the client would physically download the mission file to join the server. Currently I cant seem to find anything like that in the game files unless I am blind. Anyone know what the new file or files is called now? Thank you, Visceral.