"Microsoft" isn't really a valid answer to the question in my opinion. The company is huge and culture varies greatly from org to org and team to team.

Even concrete stuff like "offices going away" completely depends on your team.

There is an extremely thin line of commonality that you can pretty easily discern by reading blog posts and watching videos of the CEO and folks like Scott Guthrie; I find what I see in those communications to be genuine.

(disclosure: At Microsoft, and liking the culture)