What is: Multifactor Authentication - Microsoft Support
Wondering what multifactor authentication, sometimes known as two step verification, is? This article will explain it clearly.
Change your two-step verification method and settings
Tip: Two-step verification is also known as multi-factor authentication. To learn more about it see What is: Multifactor Authentication. To sign out of your devices. From the Additional security verification page, select Sign out everywhere.
Set up your Microsoft 365 sign-in for multi-factor authentication
By setting up MFA, you add an extra layer of security to your Microsoft 365 account sign-in. For example, you first enter your password and, when prompted, you also type a dynamically generated verification code provided by an authenticator app or sent to your phone.
Sign in using Microsoft Authenticator - Microsoft Support
Sign in using Microsoft Authenticator. Microsoft Authenticator helps you sign in to your accounts if you've forgotten your password, use two-step verification or multi-factor authentication, or have gone passwordless on your account.
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
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).
Set up an authenticator app as a two-step verification method
You can set up an authenticator app to send a notification to your mobile device or to send you a verification code as your security verification method. You aren't required to use the Microsoft Authenticator app, and you can select a different app during the set up process.
Use Microsoft Authenticator with Microsoft 365
If your organization is using multi-factor authentication (MFA) for Microsoft 365, the easiest verification method to use is the Microsoft Authenticator smart phone app. It's just one click instead of typing in a 6-digit code. And if you travel, you won't incur roaming fees when you use it.
About Microsoft Authenticator - Microsoft Support
Authenticator can be used three ways: As a way to verify sign-in if you forget your password. As a way to sign in every time, by using a one-time password code to increase account security. This is called two-step verification or multi-factor authentication.
Microsoft Authenticator FAQs - Microsoft Support
If you're having trouble getting your verification code for your personal Microsoft account, see Troubleshooting verification code issues. If your question wasn't answered here, we want to hear from you. Post your question to the Microsoft Authenticator forum to get help from the community.
How to add your accounts to Microsoft Authenticator
You can use Microsoft Authenticator for multiple accounts, including Microsoft personal accounts; work/school accounts; and non-Microsoft accounts, such as Amazon, Facebook, Instagram and Google. Before you add an account, download the app. Microsoft personal account Work or school accounts Non-Microsoft accounts.