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

Troubleshoot slow game or app downloads on Xbox One Account error occurs when signing in to Xbox network

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

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。

With two-step verification, you'll get a security code to your email, phone, or authenticator app every time you sign in on a device that isn't trusted. Need more help?

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.

Microsoft Authenticator is a free app that helps you sign in to all your accounts without using a password - just use a fingerprint, face recognition, or a PIN.

Signing in connects the apps to the rest of Microsoft 365, letting you save files to the cloud, share files with others, and have your documents save automatically as you work.

When you install Microsoft 365 or Office on a device, you'll be prompted to sign in the first time you start a Microsoft 365 or Office app. Office remains activated as long as you're signed in.

SharePoint is a browser-based app that you connect to through your web browser. With SharePoint, you can do many things, such as: uploading and sharing files to your document library, collaborating on files with others, creating a team site or communication site, and more.