My Authenticator app has recently lost the ability to perform a passwordless login with my Microsoft Account (@outlook.com account).
I get the prompt, choose the right number (of the 3 shown), provide my fingerprint to approve, and then it flashes a message toast "error communicating with server".
However if I do not use passwordless, the 2nd factor prompt to approve signin works perfectly normal.
This just started happening in the last day or two, I'm wondering if it's a known issue?