What two-step verification is
Two-step verification 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). Even if someone else finds your password, they'll be stopped if they don't have access to your security info. This is also why it's important to use different passwords for all your accounts.
What happens when you turn on two-step verification
What you'll need for set up
Two-step verification begins with an email address (we recommend two different email addresses, the one you normally use, and one as a backup just in case), a phone number, or an authenticator app. When you sign in on a new device or from a new location, we'll send you a security code to enter on the sign-in page. For more info about the authenticator app, see How to use the Microsoft Authenticator app.
Turn two-step verification on or off
- Go to the Security basics page and sign in with your Microsoft account.
- Select more security options.
- Under Two-step verification, choose Set up two-step verification to turn it on, or choose Turn off two-step verification to turn it off.
- Follow the instructions.
Reset your password when two-step verification is turned on
If you forget your password when you have two-step verification turned on for your account, you can reset your password as long as you have two forms of identification. Depending on what security info you have added to your account, this requirement might mean entering a security code from your authenticator app and entering a security code that was emailed to your backup email account.
To reset your password, follow the steps in How to reset your Microsoft account password. Instead of receiving one security code to verify your identity, though, you'll receive two.
If you're looking for info about changing, removing, or updating the alternate email address or phone number where you get security codes, follow the steps in either Security info & security codes or Replace your Microsoft account security info.
Where you can't use security codes, use app passwords
Some apps (like the mail apps on some phones) or devices (like the Xbox 360) can't use regular security codes. If you see an “incorrect password” error on an app or device after you turn on two-step verification, but you’re sure your password was correct, that means you'll need an app password for that app or device.
App passwords are only available if you use two-step verification. If you don't have two-step verification turned on, you won't see the App passwords section on the Additional security options page.
Read about how to create and use app passwords in App passwords and two-step verification.