What is: Multifactor Authentication - Microsoft Support
Multifactor authentication is a way of confirming your identity when you sign into online accounts with more than just a username and password. Learn how it works, why it's important, and how to enable it for your Microsoft account and other services.
Set up your Microsoft 365 sign-in for multi-factor authentication
Learn how to add an extra layer of security to your Microsoft 365 account sign-in by using an authenticator app or SMS verification. Follow the steps to set up your user account and choose your preferred authentication method.
Applies To:
Microsoft 365 admin
Download Microsoft Authenticator - Microsoft Support
The Microsoft Authenticator app helps you sign into your accounts when you're using two-step verification.
How to use two-step verification with your Microsoft account
Learn how to turn on or off two-step verification (or multi-factor authentication) to protect your Microsoft account with two forms of identity. Find out what you need for set up, how to reset your password, and how to use app passwords or go passwordless.
Change your two-step verification method and settings - Microsoft Support
Tip: Two-step verification is also known as multi-factor authentication. To learn more about it see What is: Multifactor Authentication. Manage app passwords for two-factor verification for any apps that don't support two-factor verification.
Set up an authenticator app as a two-step verification method
Open the Microsoft Authenticator app, select Add account from the Customize and control icon in the upper-right, and then select Work or school account.
How to add your accounts to Microsoft Authenticator
If your organization supports two-factor verification or multi-factor authentication sign-in, you can set up your work or school accounts to use Authenticator as one of the verification methods.
2-Step Authentication - Microsoft Support
After the account.live.com page has opened, select Security & Privacy, go to More Security Settings, scroll down and select Set up two-step verification. You'll have the option to confirm your identity via email, phone or the Microsoft account App.
Set up a mobile device as a two-step verification method - Microsoft ...
You can set up your mobile device to act as your two-factor verification method. Your mobile phone can either receive a text message with a verification code or a phone call.
How to use two-step verification with your Microsoft account
Two-step verification (sometimes called multi-factor authentication) helps protect you by making it more difficult for someone else to sign in to your Microsoft account. It uses two different forms of identity: your password, and a contact method (also known as security info).