Two years ago, we shared that “It's Time to Hang Up on Phone Transports for Authentication.” Today, we’re adding the public preview of Authenticator Lite to the tools we are offering to help you move from text message (SMS) and voice-based authentication. Our priority is getting every user to sign in with modern strong authentication – passwordless, hardened against phishing, easy to use and adaptable to evolving attacks.
Public Preview: Authenticator Lite (in Outlook) - Microsoft Community Hub