I guess I'm kinda with Goudi on this one, though not singling out Microsoft in particular. Some of the three-digit agencies probably can't believe their luck that companies are moving their commercially-sensitive data to the cloud. It's the same windfall as when fax machines were introduced.
Japanese Government was, and maybe still is, using Googledocs for its stuff. How bat!!!! crazy is that, especially now we know all its phones have been targeted for many years.
Sometimes it's OK to be a little bit paranoid. If you want something to be secure, you need to do it yourself.
Edit: *thinks* Lordy, Edge needs an ad blocker on this site. Then rediscovers the "PPRuNe no ads style" setting.
Editdit: Goudi > Gouli