Learn how to use Microsoft and Xbox gift cards, download codes and tokens to your Microsoft account. Find out how to redeem Office product keys and Windows activation codes, and get help with common problems.

Learn how to download and install Microsoft 365 apps like Word, Excel, Teams, and PowerPoint on your PC or Mac. Follow the instructions in the browser and sign in with your Microsoft 365 account to activate the apps.

Find out how to download and install Microsoft 365 or Office 2019, 2016, or 2013 on your PC or Mac. Follow the steps to sign in, choose your language and bit version, and activate your product.

Learn how to access SharePoint, a browser-based app for online collaboration and document management, through your web browser. Find out how to check your subscription, troubleshoot issues, and get training for SharePoint.

Learn how to view, manage, and install add-ins for Microsoft 365 programs on Windows. Find out how to troubleshoot add-in errors, security settings, and device permissions.

如果这是你第一次安装 Microsoft 365，则可能需要先执行一些设置步骤。展开下面的 “了解详细信息”部分。 但是如果是重新安装 Microsoft 365，且已兑换了产品密钥并拥有与 Microsoft 365 相关联的帐户，请转到“登录并安装 Office”的部分。

Learn how to use the Microsoft Authenticator app or another app of your choice as a two-step verification method for your work or school account. Follow the steps to scan a QR code, add your phone number, and get a verification code or a notification on your mobile device.

Learn how to recover files or folders that you accidentally deleted from OneDrive, either online or from your computer. Find out how long deleted items are kept in the recycle bin and how to access them.

Learn how to download and install Microsoft 365 or Office 2021 on your device, whether you have a Microsoft account, a work or school account, or a product key. Find out how to activate the apps, change the version, and get help with common issues.

Find solutions to common problems, or get help from a support agent for Microsoft 365, Office, Windows, Xbox, Surface and more. Sign in to get personalized help and access live chat, phone, or email options.