What is 2FA?
Please refer to this link: https://support.microsoft.com/en-us/office/what-is-multi-factor-authentication-c97b3170-2c05-44a6-9c7d-15953ff2a024
Please refer to this link: https://support.microsoft.com/en-us/office/what-is-multi-factor-authentication-c97b3170-2c05-44a6-9c7d-15953ff2a024