There isn't a number because you start by signing into your MS account, which has your phone number in it. Then you go to the Microsoft Windows 10 webpage. Use Support for Email and Communications....

I signed up for a phone call from MS Support. It told me the wait was 270 mins so I set my alarm ;) About midnight Omar called to help. He grabbed my screen and took off. MSCONFIG went to check...

I upgraded from Win 8.1 to Win 10 on 2 Aug 2015. I prefer to use my long-time Comcast account for email so it connected it with no problem. On the 5th or 6th of August the Win Mail screen appears to...