Are you up to date with Orc's War and Northcrest's Conspiracy stories?
The devlog mentions that it is triggered if you are up to date with the Orc's War and updated Everett about the situation, the other thing is having confront Everett when you saw him with Booner.
Lastly, you should talk with Alden first, now you should be able to talk with Everett about clearance level.