A Microsoft file hosting and synchronization service.
It has been said by other responders (BUT not by Microsoft) that shared folders in OneDrive Personal and Family have been disconnected and are now only available in OneDrive Business. It has been suggested this is a money-making opportunity for Microsoft as there is no way to upgrade your personal or family account to a business account so you would have to purchase a whole new account in order to use shared folders. I am hoping this is not the case and that someone from Microsoft will respond to this and tell me why these rumors are running around and they are false OR for that matter confirm them and then we will know what we are dealing with. Either way it is a bit ridiculous we have all been dealing with this since July.