Account & profile | XBOX Support
Find everything you need to manage your Microsoft account, XBOX profile, and more.
XLOOKUP function | Microsoft Support
XLOOKUP is not available in Excel 2016 and Excel 2019. However, you may come across a situation of using a workbook in Excel 2016 or Excel 2019 with the XLOOKUP function in it, if it was created by someone else using a newer version of Excel.
Applies To:
Excel for Microsoft 365, Excel for Microsoft 365 for Mac, Excel 2024, Excel 2024 for Mac, Excel 2021, Excel 2021 for Mac, Excel 2019, Excel 2016, Excel for iPad, Excel for iPhone, Excel for Android tablets, Excel for Android phones
Sign in to Microsoft 365 | Microsoft Support
Learn how to sign in to Office or Microsoft 365 from a desktop application or your web browser.
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
查找 Xbox 主机 ID、设备 ID 和序列号 | Xbox Support
查找 Xbox 主机 ID 或设备 ID 只能在“设置”中查找主机 ID。主机 ID 不同于主机序列号。
Contact - Microsoft Support
Azure Microsoft Developer Microsoft Learn Support for AI marketplace apps Microsoft Tech Community Microsoft Marketplace Software companies
Activate Windows | Microsoft Support
Learn how to activate Windows using a product key or digital license, check your activation status, and link your Microsoft account.
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
如何登录到 Microsoft 帐户 | Microsoft Support
如何登录到 Microsoft 帐户 Microsoft帐户供 个人 使用，以及用于访问 Outlook.com、Microsoft 365 或 Xbox 等服务。 一些学校、学院和组织使用 Microsoft 365 商业版。 如果你是学生或员工，你将拥有一个Microsoft 工作/学校 帐户。 选择帐户类型，或了解有关 差异 的详细信息。
查找 Xbox 主机的授权服务提供商 | Xbox Support
若要获得 Xbox 主机的亲自服务，您可以访问Microsoft授权服务提供商，以获取由受信任的专家使用正版Microsoft更换部件执行的优质服务。
Find your Windows product key | Microsoft Support
Learn how to find a Windows product key for activation, and when you'll use a digital license instead.
Applies To:
Microsoft account dashboard