If you cannot sign into Edge with a Microsoft account, remove your account from Microsoft Authenticator and try again. More suggestions here.

On Microsoft Edge, you can review, add, edit, and remove the personal information the browser saves while interacting with different online services. Review saved personal info ...

To use Internet Explorer Mode in Edge, launch Edge and click the “Ellipses” button in the top-right corner of the window. In the drop-down menu that appears, select “Settings.” ...