Outside the Wire

Outside the Wire is a Brotherhood of Steel main quest in Fallout 4.

Detailed walkthrough
During your infiltration of the Institute, Proctor Ingram has ordered you to steal data from one of their terminals using the network scanner holotape.

Access the terminal at the Institute relay area and entrance, insert the network scanner holotape, and remove the data. Then simply continue the rest of the main quest Institutionalized. Return to Proctor Ingram and give her the data.

This holotape may also have been given by, and then handed by the Sole Survivor back over to, another faction -- e.g., to Sturges of the Minutemen as part of Inside Job. If so, then before you can give it to Proctor Ingram at Boston Airport, you may first need to retrieve it by asking for a copy of the holotape while this quest is selected in your Pip-Boy. Maxson may remind you of your need to complete the turn-in to Proctor Ingram, but he won't remind you from whom you ought recover it first. Whatever quest path you took, Quinlan will get to work on analyzing the data.