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

Check the Xbox services, games, and apps for any service outages.

To check whether your device is joined to your network

Download and install Microsoft Authenticator app Download and install the Microsoft Authenticator app for Android, iOS or Windows Phone. Set up the Microsoft Authenticator app Choose the mobile app Open a browser on your computer and go to portal.office.com. Sign in to your Office 365 for business account.

在 iOS 设备上安装 Authenticator 扫描 QR 码或从 Apple 应用商店下载并安装 Authenticator。 ... 1 对于 iOS，推送通知仅通过 QR 码扫描工作。

Learn how to set up your user account for multifactor authentication with Microsoft 365.

Using Authenticator as a way to sign in If you have turned on passwordless, two-step, or multi-factor authentication for your account, use the following steps to sign-in: Go to the site where you want to sign in. Enter your username at the sign-in prompt and select Next. Select Send notification.

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.

If this is the first time you're setting up Authenticator, you might receive a prompt asking whether to allow the app to access your camera (iOS) or to allow the app to take pictures and record video (Android). Allow the app to use the camera so that you can take a picture of a QR code in one step.