[flakeoil]

The article does not discuss what to use instead of Microsoft's products, it discusses a better architecture for authorization than the one Microsoft uses. The architecture which Microsoft uses is flawed and too many companies rely on it.

The solution in short: "...distributed in the form a key who’s pieces live across a decentralized network."

If looking for alternatives to Microsoft's products I would recommend Infomaniak [0]. They have a fairly complete solution of business tools (email, contacts, calendar, cloud storage, file sharing, chat, video meetings, docs and sheets).

[0] https://www.infomaniak.com