Sign in to Microsoft 365
For Microsoft 365 or Office apps installed on a Windows PC: If you're not already in a Microsoft 365 or Office file or document, open an app such as Word or Excel, and open an existing file, or create a new one.
Applies To:
Excel for Microsoft 365, Word for Microsoft 365, Outlook for Microsoft 365, PowerPoint for Microsoft 365, Access for Microsoft 365, OneNote for Microsoft 365, Project Online Desktop Client, Publisher for Microsoft 365, Excel for Microsoft 365 for Mac, Word for Microsoft 365 for Mac, Outlook for Microsoft 365 for Mac, PowerPoint for Microsoft 365 for Mac, OneNote for Microsoft 365 for Mac, Excel 2024, Word 2024, Outlook 2024, PowerPoint 2024, Access 2024, OneNote 2024, Project Professional 2024, Project Standard 2024, Visio Professional 2024, Visio Standard 2024, Office 2024, Excel 2024 for Mac, Word 2024 for Mac, Outlook 2024 for Mac, PowerPoint 2024 for Mac, OneNote 2024 for Mac, Office 2024 for Mac, Excel 2021, Word 2021, Outlook 2021, PowerPoint 2021, Access 2021, Project Professional 2021, Project Standard 2021, Publisher 2021, Visio Professional 2021, Visio Standard 2021, Excel 2021 for Mac, Word 2021 for Mac, Outlook 2021 for Mac, PowerPoint 2021 for Mac, OneNote 2021 for Mac, Office 2021 for Mac, Excel 2019, Word 2019, Outlook 2019, PowerPoint 2019, Access 2019, Project Professional 2019, Project Standard 2019, Publisher 2019, Visio Professional 2019, Visio Standard 2019, Excel 2016, Word 2016, Outlook 2016, PowerPoint 2016, Access 2016, OneNote 2016, Project Professional 2016, Project Standard 2016, Publisher 2016, Visio Professional 2016, Visio Standard 2016, OneNote for Mac, Microsoft 365 for home, Office 365 Small Business, Microsoft 365 admin, Project Online, Microsoft 365 for Mac, Project for Office 365
Microsoft 支持 | Microsoft Support
Microsoft 支持可帮助你处理 Microsoft 产品的问题。 查找有关 Microsoft Copilot、Microsoft 365、Windows 11、Surface 等的操作方法文章、视频和培训。
与我们联系 | Xbox Support
需要有关 Xbox 主机、Xbox 游戏或 Xbox 网络的帮助?了解如何与我们联系。
Contact us | Xbox Support
Need help with an Xbox console, an Xbox game or Xbox network? Find out how to get in touch with us.
重置忘记的 Microsoft 帐户密码 | Microsoft Support
另请参阅 如果这些步骤不起作用，或者你遇到其他帐户登录问题，请使用我们的 登录帮助程序工具。 Microsoft 帐户安全信息和验证代码 如何帮助保护 Microsoft 帐户的安全 更改或重置 Windows 密码 访问去世用户的帐户 需要更多帮助吗？ 无法登录？ 如果无法登录到Microsoft帐户，大多数问题都可以通过 ...
Applies To:
Microsoft account dashboard
Download Microsoft Authenticator | Microsoft Support
iOS Android To install Authenticator on your iOS device Scan the QR code or download and install Authenticator from the Apple app store.
Reset a forgotten Microsoft account password
Learn how to reset or change your Microsoft account password. Get help with a forgotten Microsoft account password.
Applies To:
Microsoft account dashboard
查找你的 Windows 产品密钥 | Microsoft Support
了解如何查找用于激活的 Windows 产品密钥，以及何时改用数字许可证。
Applies To:
Microsoft account dashboard
Windows help and learning | Microsoft Support
Find help and how-to articles for Windows operating systems. Get support for Windows and learn about installation, updates, privacy, security and more.
如何使用远程桌面 | Microsoft Support
Windows 11 Windows 10 摘要 使用 Windows、Android 或 iOS 设备上的远程桌面从远处连接到 Windows 电脑。 你可以像坐在远程电脑前一样访问应用、文件和桌面。 本文介绍如何设置用于远程访问的 Windows 电脑，以及如何从其他设备连接到它。 开始之前 要连接到 (远程电脑的电脑) 必须运行 Windows 专业 版 Windows ...