Microsoft includes a bunch of non-Azure products under their cloud revenue. And they do it to confuse people and falsely claim they're outpacing AWS, which as you just proved, works.
There's similarities, but key differences that you can easily look up to better understand. Hence part of why most aren't huge fans of including O365 to claim Azure's bigger than AWS.
I doubt it, but that’s just speculation without anything to back it up.
So any concrete data would be interesting.
If the claim is that Microsoft's cloud revenue is bigger than Amazon's, I would assume that includes Office365. Office365 isn't just Word and Excel on the desktop, it's Outlook, Dynamics CRM, Sharepoint, Teams, etc.
Even if the bulk of the Office365 ecals they're selling are for the lowest tier offering that still includes Outlook and Onedrive which a lot of organizations use fairly heavily.
Edit: Okay they only offer document storage you still need to edit your documents with MS Office.