Group leader sets a marker, orange GPS line appears for group leader, team mates don't see GPS line, they do see a marker on the map in the left top.
I have to admit it does work 1 out of 100 times. (team makes have GPS enabled in the settings)
Long time ago when D1 just came out, it worked like this:
Group leader sets a marker to a mission or side mission, the team members could see the GPS line, and ALSO they heard the voice intro, in main mission this was Faye Lou and in side mission it was the officer of that distric.
This stopped working in after update 1.5 or 1.6, can't remember after 3 years playing
Nowadays in D1, when the leader starts a mission, you only get a notification when the group leader fast travels to the mission, instead of when he starts it and no voice intro, only when you arrive at the mission yurself.
This is the same now in D2.
Not hearing the intro sounds of the mission kinda takes away the "experience" of these missions.
The group leader hears them though, so why not the team mates.
It use to work fine, but it's broken since a long time, and I guess D2, looking at the bugs we see, has a lot of the same code as D1 and this it's also broken in D2