Two-factor authentication is a mechanism that allows users to verify an attempt to authenticate. The user must provide a one-time code to confirm authentication that is sent to their device. This code is sent, for example, via text message or generated by a code via an app such as Microsoft Authenticator is an app developed by Microsoft with which you can protect all your accounts with a two-step verification. The app supports you in securing your online accounts using time-based OTP codes (one-time password) according to industry standards. Official Microsoft Authenticator website on a smartphone.
the Multi-factor authentication ( MFA ), also known as multifactor authentication, is a generalization of the Two-factor authentication , in which the access authorization is checked by several independent characteristics (factors)