By setting up MFA, you can add an extra layer of security to your Microsoft 365 account credentials. For example, you first specify your password, and when prompted, enter a dynamically generated verification code provided by the authenticator APP sent to your mobile phone. Without inserting the right input code, you are denied to access your mailbox.
From 1/7/2021 onwards, all emails users (except for internal usage) must use multi-factor authentication to log in to the company mailbox.
Please refer to the instructions bellow for your references.How to use Microsoft Authenticator ( English & Vietnamese )
https://www.youtube.com/watch?v=PaSaq99c9n8
