Watching "Stress Relief" S05E14; does anyone know how they do the board room window shots?

In a great moment, Michael walks to the window and fake contemplates the situation at hand by looking out at "the city".

Does anyone know if they just used an LA office building and used a real shot of LA for the window or did they do some kind of green screen setup and the board room was actually in the og office studio lot?

Thanks!