Just because she skipped over some unimportant parts of the story doesn't mean she didn't have plenty of time after being shown around the building to accomplish her objectives. She does address this, too:
> I took FOREVER looking around this office space, and eventually they said their goodbyes because they had to go back to work. They had a strict policy of escorting visitors. But I had been seen walking around with trusted insiders so no one questioned me.
> I was free to take my time. I made myself at home. My main objective at this site was to weasel my way into private corner offices.