Overview of formulas in Excel - Microsoft Support
Master the art of Excel formulas with our comprehensive guide. Learn how to perform calculations, manipulate cell contents, and test conditions with ease.
Applies To:
Excel for Microsoft 365, Excel 2021, Excel 2019, Excel 2016
向 Microsoft 帐户兑换礼品卡或代码 - Microsoft 支持
了解如何兑换礼品卡、代码或 Office 产品密钥，以及如何在 Microsoft Store 在线商店、Windows 或 Xbox 上花费余额。
Applies To:
Microsoft account dashboard
激活 Office - Microsoft 支持
如何激活预安装在新 Windows 10 计算机上的 Office 或使用新的产品密钥。
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, Publisher for Microsoft 365, Visio Plan 2, Excel 2021, Word 2021, Outlook 2021, PowerPoint 2021, Access 2021, Project Standard 2021, Publisher 2021, Visio Professional 2021, Visio Standard 2021, Office 2021, OneNote 2021, Excel 2019, Word 2019, Outlook 2019, PowerPoint 2019, Access 2019, Project Standard 2019, Publisher 2019, Visio Professional 2019, Visio Standard 2019, Office 2019, Excel 2016, Word 2016, Outlook 2016, PowerPoint 2016, Access 2016, OneNote 2016, Publisher 2016, Office 2016, Microsoft 365 for home, Office for business, Office.com, Project for Office 365
End of support for Cortana - Microsoft Support
Explore subscription benefits, browse training courses, learn how to secure your device, and more.
Modifier l’image d’arrière-plan du Bureau - Support Microsoft
Utilisez l’application Paramètres Windows pour modifier les arrière-plans et les couleurs de votre bureau.
Meet Windows 11: The basics - Microsoft Support
Get to know your way around Windows 11, from where to search to how to stay organized. Watch the video and read tips about new features.
Windows camera, microphone, and privacy - Microsoft Support
In Windows, having a camera and microphone as part of your device lets you make Teams video calls, take pictures, record videos, and more. Many apps and services request and use the camera or microphone, and Windows settings give you control over which apps can use your camera or microphone.
Trouver votre clé de produit Windows - Support Microsoft
Découvrez comment trouver une clé de produit Windows pour l’activation et quand utiliser une licence numérique à la place.
Applies To:
Microsoft account dashboard
Create, edit, or delete a contact list or contact group in Outlook
Contact groups, or distribution lists, are a fast way to send a message to multiple email recipients, especially groups you repeatedly contact.
Applies To:
Outlook for Microsoft 365, Outlook 2021, Outlook 2019, Outlook 2016, Outlook on the web, Outlook.com, New Outlook for Windows
OneDrive help & learning
Explore OneDrive support, help, and learning resources. Learn how to protect your important files, documents, and memories with OneDrive.