#1. if her manager (we should really name him, shouldn't we?) is a legal resident, she would definitely find him on the residency register or its new amsterdam equivalent. however, for finding out about him — because finding him on there would spark her curiosity — she would be more likely to turn to the staff. it's not that she doesn't trust the neighbors, but it's easier to talk to people on her own level than it is to maintain that kind of solid cover while being nosy.

#2. daisy isn't going to advertise on the clock that she's moved, but johnny is aware and they do talk about things quite freely together at work! i'm not opposed to her manager overhearing OR seeing her in the elevator/lobby/rooftop/other public spaces either if that helps to move things along.

#3. we've mentally imagined dwight schrute — but maybe a more attractive dwight, given the affair. but as far as workplace politics goes, having someone in a managerial position who's not technically competent enough to do their jobs would irritate both daisy & johnny, so perhaps something along those lines! how he got his job is likely a significant mystery that lends itself to plenty of workplace commiserating. did he kill someone? did he inherit the job? did he kiss exactly the right butt at the right time before someone died or quit or was fired? who knows... but they sure would like to!