Learn how to identify and open encrypted and protected emails no matter what email client you're using.

Find out how to submit a request for a refund for a purchase of digital Xbox content.

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

Learn how to sign in and create app passwords for Microsoft apps and devices that don't support two-step verification.

Learn how you can use the free Microsoft Authenticator app to sign in to all your accounts without using a password.

Want to add a padlock to your email messages? You can use encryption and digital signatures in new Outlook, classic Outlook, and Outlook on the web for work or school accounts to increase the security of messages. Encrypting an email message in Outlook means it's converted from readable plain text into scrambled cipher text. Only the recipient who has the private key that matches the public ...

When you try to create a new signature linked to your own account (cloud signatures), you notice that the newly created signature gets deleted after a while or you may find that the signature does not sync up with Outlook Web App (OWA).

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About digital signatures and certificates in Office, and buying a digital certificate from a certificate authority or create your own.

If you’re tired of having to remember or reset your password, try using a FIDO2–compliant security key to sign in to your Microsoft account instead. What is a security key? A security key is a physical device that you can use instead of your user name and password to sign in. Since it needs to be unlocked with a fingerprint or PIN, even if someone has your security key, they won’t be ...