Hi everyone,
Thank you for bringing this to our attention. We are aware that some customers are unable to connect to their Microsoft Account (MSA) from a Windows device as a connected account sign-in and we are working to get this fixed at the soonest possible time.
For the time being, please use a local Windows login account. You may try to reattach your MSA as a connected account at a later time.
Please take note that no troubleshooting is required. You should still be able to access other Microsoft Online assets such as Outlook.com, One Drive, etc. Logging in with a local Windows account will still make your systems secure.
Your patience on this matter is very much appreciated.
Thank you.