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获取 Windows 操作系统的官方支持和帮助信息，以及如何使用 Windows 的指南。
Sent email in Outlook.com comes back "delivery failed"
Try these solutions if sent messages in Outlook.com come back with a "delivery failed" error.
Applies To:
Outlook.com
Open and close Outlook Data Files (.pst) - Microsoft Support
Learn how to open and close Outlook Data Files (.pst) that contain copies, archives, or backups of your Outlook information.
Applies To:
Outlook for Microsoft 365, Outlook 2021, Outlook 2019, Outlook 2016, Outlook 2013
“Microsoft 手机连接”和“连接至 Windows” 简介 - Microsoft 支持
“你的手机”现在是“Microsoft 手机连接”！ 详细了解我们最近对电脑和 Android 移动应用的名称更改。
Cómo canjear códigos y tarjetas de regalo | Xbox Support
Aprende cómo canjear una tarjeta de regalo Microsoft o Xbox u otro código en tu dispositivo móvil, dispositivo Windows o consola Xbox.
Import and export Outlook email, contacts, and calendar
Find the information you need to import to or exporting from Outlook, whether you're using Office 365, Outlook 2016, or a Mac.
Applies To:
Outlook for Microsoft 365, Outlook for Microsoft 365 for Mac, Outlook 2021, Outlook 2021 for Mac, Outlook 2019, Outlook 2019 for Mac, Outlook 2016, Outlook 2013, Outlook.com
GROUPBY-function - Microsoft 支持
groupby 函数允许通过公式创建数据摘要。它支持沿一个轴进行分组并聚合关联的值。 例如，如果你有一个销售数据表，则可以按年份生成销售摘要。
Applies To:
Excel for Microsoft 365
Use the web version of Outlook like a desktop app
Use Outlook in the new Microsoft Edge. In Microsoft Edge, sign in to your Outlook on the web or Outlook.com account.
Applies To:
Outlook Web App for Office 365, Outlook Web App for Office 365 Small Business, Outlook on the web, Outlook.com, Outlook on the web for Exchange Server 2019
Returning items you bought from Microsoft for exchange or refund
Learn how to receive a refund or exchange for items purchased from Microsoft.
Applies To:
Microsoft account dashboard
View and manage your subscriptions on Xbox | Xbox Support
Get info on how to sign up for, extend, or check the latest offers on subscriptions on your Xbox console.