Microsoft has, in typical fashion, gotten very confused about this. Some teams are still one person per office (some more junior (measured by tenure, not level)

Microsoft has, in typical fashion, gotten very confused about this. Some teams are still one person per office (some more junior (measured by tenure, not level) team members probably share, all interns typically share), other teams are using open work environments... sometimes pushing the limits of what the fire code permits for number of people in a building. The trend when I left (4/13) was towards open offices Internally, for teams that use offices, there is something known as the "pain index" which is the person/office ratio. As a rule of thumb, you might be expected to share an office upto about two years, and by about 5 years might expect to have a window office - but it was very dependent on team [Edit - added pain index]