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