> "To the extent necessary to provide the Services to you and others, to protect you and the Services, and to improve Microsoft products and services, you grant to Microsoft a worldwide and royalty-free intellectual property license to use Your Content, for example, to make copies of, retain, transmit, reformat, display, and distribute via communication tools Your Content on the Services," the clause reads.
Well, this does make sense in the context of Office 365, OneDrive and the Office web apps in general. (Still dodgy regarding the "worldwide" part but there's no way around that because people can and do expect to access their stuff even while on vacation)
Silently enabling the training of remote AI however? That's not covered under any reasonable interpretation of the above legalese.