You can resolve problems with Microsoft Authenticator by checking the tips in this article and reviewing some of the known errors.

Find out what to do when you receive a “Call us overprotective” message when signing in to Xbox.com.

Xbox Support 提供 Xbox、Game Pass 及帳單問題的協助，並在社群中取得建議與客戶服務。

Notes: If you don't see the security key option, it's possible that your organization doesn't allow you to use this option for verification. In this case, you'll need to choose another method or contact your organization's help desk for more assistance. Before you can register a security key, you must have at least one additional security verification method registered.

To install Authenticator on your iOS device Scan the QR code or download and install Authenticator from the Apple app store. Get the app

To back up your accounts on an iOS device you need to enable iCloud to use Authenticator and then enable backup in Authenticator. Enable iCloud Drive on your iOS device.

Due to the built-in security settings in iOS, other apps aren't able to see the address (URL) an app is trying to open, including those being opened in the web browser.

Messages that have the encrypt-only policy applied can be read directly in new Outlook, Outlook on the web, Outlook for iOS and Android, Outlook for Windows versions 2019 and newer, and Microsoft 365.

Find out what to do if you receive a sign-in error when your age is verified.

A digital signature attached to an email message offers another layer of security by providing assurance to the recipient that you—not an imposter—signed the contents of the email message. Your digital signature, which includes your certificate and public key, originates from your digital ID. And that digital ID serves as your unique digital mark and signals the recipient that the content ...