Microsoft can't cloud because, well Microsoft can't.
https://archive.ph/6vq4f
Freed version
But Amazon paused the rollout after Microsoft discovered a Russia-linked hacker group had gained access to some of its employees’ email accounts. After conducting its own analysis of the software, Amazon asked for changes to guard against unauthorized access and create a more detailed accounting of user activity in the apps, some of which Microsoft also markets as Office 365.