Can this be installed on the office window which would allow a person to see on one side, but prevent the other side to see through it?

This material is opaque and blocks visibility from both sides. The UltraCool-S1560 may do this provided that the lights outside of the office are brighter than inside the office. We suggest getting a sample to see it in the area before ordering. https://www.decorativefilm.com/ultrablock-silver-1560