What is Microsoft Authenticator?

Microsoft Authenticator is a mobile app developed by Microsoft that provides an additional layer of security for your online accounts. Microsoft Authenticator adds an extra layer of security beyond just a username and password. After you enter your password, the app generates a time-sensitive security code, often in the form of a six-digit number. Microsoft Authenticator application includes various authentication methods such as log-in approvals, single-use passcode generation, push notifications and password-less. The app can be used on Android and iOS devices.