Hello. I'm at the moment doing the quest 'Synth Retention' for the Institute and reached the (presumably) last stage, which is visiting the Quarters that are given to the player during this quest. However, I can walk as much as I want through the Quarters, the quest will never update or end and the quest marker simply stays at it's spot (http://i.imgur.com/gUZBBt4.jpg).

I've tried loading earlier saves, restarting the program, waiting for several days and even ran through the entire Institute, hoping that the quest marker may simply be bugged and that my actual Quarters are somewhere else, but nothing worked. I know that I'd be able to force the quest to progress via Console Commands, but I cannot find Synth Retention's quest ID at all. Any help would be appreciated.

I've got the same problem at the moment, I'm still trying to find the quest ID though.

Same issue here. I looked up a YouTube and the courser X6 is supposed to be waiting for you outside your quarters, and he isn't there for me (and presumably you).

Bump.

Yeah, same issue. Interesting, I wonder if we could find his ID and spawn him.

His ID could be found by just clicking on him while having the Console opened, but I'm not sure whether he'll actually provide the dialogue needed for the quest.

Okay, I somehow managed to fix the quest by fast travelling to Nahant Sherrif's Department, which is right outside of Libertalia and the location where you first meet the Courser. When I arrived, I heard a few Raiders spontaneously dying, upon which the quest got completed and the next one started. I hope this works for everybody else having this weird issue.

It took a few seconds, and I didn't hear anyone die, and I had to kill a random mongrel, but after traveling to the Nahant Sheriff's Department it worked like a charm. Good catch!