This page contains a walkthrough for the An Office With a View quest in Prey. It's part of the main storyline and starts after you've entered the Talos I Lobby. This mission takes place in the Lobby. It involves visiting the protagonist's office in order to play a video recording (just like January suggested).
Reaching the office
You start exploring Talos I Lobby on the second level and have to reach the protagonist's office which is located on the third level (this is the first big location so it's a good idea to look at the map often). Begin by investigating the corridor up front, as the corpse found next to the long sofa has valuable items (the loot are generated randomly, and will differ in each instance).
Go down the stairs to the first level and head south, going through the central part of the Lobby (with the broken main elevator). Reach the stairs located in the southwestern corner of the map. Go up to the third level.
When you're on level 3, enter Executive Offices (you'll pass by a "friendly" turret on the way). Yu's office is closed but January should contact you in the meantime and give you the code to the door - 0451. Alternatively, you can learn the code by using Jason Chang's computer and reading an e-mail - the password for the computer can be found on the note stuck to the screen.
Playing the video
There are many valuable items (including a few neuromods found the desk and a GLOO Cannon Ammo Fabrication Plan in the safe)) and interactive devices to be found in the protagonist's office, although looking for them is completely optional. The most important thing is to interact with Yu's computer. Select the third bookmark (Utilities) and confirm the will to play the video which then will be displayed behind you. Having watched the (incomplete) video, listen to Alex Yu's and January's commentary. The mission is over.