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

Microsoft Software Licence Terms for Xbox and gaming applications for Android and iOS/iPads IF YOU LIVE IN (OR ARE A BUSINESS WITH A PRINCIPAL PLACE OF BUSINESS IN) THE UNITED STATES, PLEASE READ THE “BINDING ARBITRATION AND CLASS ACTION WAIVER” SECTION BELOW.

Once you remove your password from your account, you will need to sign in using a passwordless method like the Microsoft Authenticator app, Outlook for Android, Windows Hello, physical security keys, or SMS codes.

If your passkey for a work account was created using a camera or authenticator app in your Personal profile, you will need to recreate a passkey in your Work profile.

點選下方的按鈕以安裝 iOS 版 Microsoft 365 Copilot 應用程式，該 Microsoft 365 Copilot 應用程式 將 Word、Excel 和 PowerPoint 合併成單一應用程式，其中引進了以行動為中心的全新功能來檢視、編輯及共用檔案，而不需要在多個應用程式之間切換。

Before you can use Authenticator as a way to sign in, you need to download the app and have already added Authenticator to your accounts. Starting July 2025, the autofill feature in Authenticator will stop working, and from August 2025, passwords will no longer be accessible in Authenticator.

Learn how to install the Microsoft 365 Copilot mobile app on your iPhone or iPad and use the apps with Microsoft 365.

Learn how the Microsoft 365 Copilot app for Android or for iOS works with Microsoft 365 subscription.

In the Microsoft 365 Copilot app you can upload or create files, ask questions, collaborate on AI-generated content, set up agents that help you be more productive, and add a wide array of custom agents and apps.

You can add up to 4 additional devices (for a total of 5 per person) to your Microsoft Defender account by installing the app on your other devices and signing in using the same personal Microsoft account.