I am currently getting a HTTP Error 401 message in Edge (Beta). It only happens when trying to authorise via ADFS, Azure AD authorisation is working as expected. When I try the same operation in Google Chrome, everything is working as expected (see pic).
I have completed the following:
Cleared browser history.
Cleared password history.
Removed any relevant entries from credential manager
Renewed my certificate.
Only other relevant info I can think of is that I changed my password at some point last week.