In our european company (insurance/gov space) we use Teams, Outlook, Sharepoint as side products of Office, largely to get the official editing tools for the documents our clients provide. Depending on who you are in our company, you are using either Mac or Windows, although we are slowly shifting to OpenSUSE. Azure and GitHub are completely out of the question, and OneDrive is only used in the context of Teams/Sharepoint. Sharepoint, too, is only used by half the company for whom it is relevant.

Security-wise most of our data is with our customers on european servers (Word/etc. are not linked to OneDrive), except billing.