Did anyone consider security?
So, you put all your business documents into MS's cloud, and your information then goes looking for the people who need it most… like your colleagues, contractors, suppliers, customers, competitors, criminals.
Of course, each company is going to have its own silo, but some company data is not supposed to move freely within the organisation (HR, R&D), and some documents are destined to go outside, but a draft letter is not the same as the final copy. So, it will be down to individual users to change the permissions on individual documents as they are created and completed. What could possibly go wrong?