Hi again! Sorry for my last post being in Swedish, was so excited about the SAM mod that I didnt think ahead... :)
Anyway, me and my group Arma 3 Kronor uses a lot of different mods, but not ACE3 yet. However, we are using AGM (version 0.953) and if I would be guessing thats what makes the option disappear in multiplayer. It works just fine in the editor.
Its enough for me that you acknowledged that there is a problem and that you are aware and looking into it. Then I know that its not my installation that is corrupt :)
Anyway - keep up the good work, your mod is great!