Protecting the Future

M17: Protecting the Future is the 17th main mission in Deus Ex: Mankind Divided, and one of the last missions (depending if you did M16: Stopping Marchenko first). Adam Jensen must save Nathaniel Brown and the UN delegates if he wants to stop the Illuminati conspirators' plans, but at the cost of hundreds of others' lives.

Objectives & XP Rewards
Legend: Find and Protect the Delegates: 3150 GTD + 200 SMO
 * GTD - Getting Things Done
 * GHO - Ghost
 * SMO - Smooth Operator

Find and Protect the Delegates
If you did the The Heist and got the Orchid cure, you can use it right after the cutscene to save Jim Miller (and get the He's [Not] Dead, Jim achievement) or, if you do not think you will make it to the delegates in time, save it for them. However, if you move quickly enough and do this one before dealing with Viktor Marchenko, you can stop the delegates from taking a sip and therefore save them without needing the antidote.

Despite what Marchenko says, he will not detonate right away. If you did not set off any alarms, you will have 10 minutes to save the delegates and stop Marchenko before he sets off the bombs. If you do both successfully, you will earn the Spokes in Two Wheels achievement. Having a lot of biocells, Icarus Landing, and maxed out glass-shield cloaking and cybernetic legs will greatly help to get the achievement if this mission is done first.

The easiest way is to make your way to the elevator that will go to the conference rooms. Of course, the path is covered with guards and turrets. You can either ghost by them (remember to use the leg silencers if you walk/run) or use the vents to get close enough. The key thing is to move quickly as you can. Do NOT call the elevator to the floor if you are trying to ghost as it will attract the nearby guards’ attention. Instead, go through the nearby door with your keycard and fall down to the elevator below. If you gave Alex the evidence from M7: The Rucker Extraction, she will contact you here to give you a code. Take the elevator to the VIP rooms and run to the door at the end to save the delegates. You will have to hack or use a multi-tool if you did not get the code. Once in, a cutscene plays out and, if you were quick enough, Adam will stop the delegates from taking a sip. Otherwise, if you have the cure, you can save them with that. If you were too slow, they will be dead.

If you did this one before dealing with Marchenko, there is a hidden door in the conference room (it is part of the green monitors behind the mounted camera). Use it to access a hidden path to the exhibition hall to face Marchenko one last time.

If you did this mission last, then it will cut to the ending and you can see how your choices play out in your conversation with Alex and on the news.