Marc's warning is a holotape in Fallout 4. It is recorded by Marc Wilson.
Location[]
The holodisk can be found on the second floor of Wilson Atomatoys corporate HQ in an office, on a desk, next to an operations terminal.
Transcript[]
Damn it, Nate, where are you? After today's meeting, it's going to take a miracle to salvage the SCYTHE contract. And you decide to take the evening off? Look, I wanted to keep the old man out of it. But what could I do? He called me out in front of the board! I had to fire him! Where do you stand, Nate? Are you with me, or with him? I want you in my office Monday at nine sharp. We can discuss the contract, or we can discuss your resignation. It's up to you.