A Microsoft file hosting and synchronization service.
Happens to me as well. My wife and I shared a Home 365 subscription. And there are some folders, natively in her account, that I have been syncing for years. And suddenly it becomes a link (URL).
Does anyone know if this applies to 'Enterprise' subscription as well (we use Sharepoint for the Enterprise account, and do not see this problem).
Reason I ask is that tickets opened within an Enterprise account is handled much quick than a ticket from 'Personal' account.