Making mods mandatory/optional

[Minhal]

In multiplayer i see some servers having mods mandatory (can not join without having it activated) and some with optional mods (can join without but recommended). How is this managed from the mission maker perspective?

[Kanelbolle]

Open the Miz file as a zip file.

Change the mission file.

Remove the mods in the first part of the file under requiredModules.