This is story related and should be unmissable,
however people are reporting this to not unlock so it can be buggy.
It has also been reported that this can pop later in the game at random.
*** Spoiler - click to reveal ***
It should unlock as soon as you exit the vault for the first time, if not it might unlock at random when playing.
If it doesnt pop for you, reload a save or save your current game and start a new one and just run through the tutorial until you exit the vault.
For anyone wondering, yes you can return any time you want.
A good rule to follow with games like this is to save often.