The Microsoft Authenticator app helps you sign into your accounts when you're using two-step verification.

This is called two-step verification or multi-factor authentication. As the only way to sign in - just tap an approval on your phone to sign in. This is called going passwordless. Just follow the …

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.

Wondering what multifactor authentication, sometimes known as two step verification, is? This article will explain it clearly.

Set up multifactor authentication If you haven't already done so, when you sign in to your Microsoft 365 account a security dialog box appears reminding you to set up basic security:

If you have problems signing in with two-step verification, get more information at Having trouble with Two-factor Authentication. Find out how to Get started with the 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.

Conveniently and securely sign in to all your online accounts using multifactor authentication, passwordless sign-in or password autofill with Microsoft Authenticator.

Learn how to fix email issues for error code 5.7.515 when sending email to Outlook.com (the sending domain does not meet the required authentication level).

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.