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The Microsoft Authenticator app helps you sign into your accounts when you're using two-step verification.
- Microsoft
Verify your Microsoft account using authentication codes...
- Microsoft
Learn how to manage your Microsoft account security info and troubleshoot verification code issues.
Verify your Microsoft account using authentication codes sent via SMS.
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.
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).
Manage your Microsoft account security information and settings, including multifactor authentication and verification methods.
There are a number of possible explanations for why verification codes don't always arrive. Read through the list of the most common causes, and see if any of them apply to you, or use our troubleshooter to help guide you. Start.
