Microsoft Edge 中的 Internet Explorer 模式 - Microsoft 支持
Internet Explorer 11 支持已于 2022 年 6 月 15 日结束。 如果访问的任何网站需要Internet Explorer 11，则可以在Microsoft Edge中使用Internet Explorer模式打开它。
Office のライセンス認証を行う - Microsoft サポート
新しい Windows 10 PC にプリインストールされている Office をライセンス認証する、または新しいプロダクト キーを使用する方法について説明します。
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
更新到新Microsoft Edge - Microsoft 支持
如果我的设备上没有管理员权限，该怎么办？ 若要完全升级到新的 Microsoft Edge，必须使用管理员帐户登录到设备。
How do I get Microsoft Teams? - Microsoft Support
Learn how to download Microsoft Teams. Get Microsoft Teams with Microsoft 365 or download a free version of Teams.
Applies To:
Microsoft Teams
Account help
Get help for the account you use with Microsoft and learn how to set up, protect and manage your services and subscriptions.
Find out which Surface model you have - Microsoft Support
Look in the Surface app. The easiest way to find which Surface model you have is to use the Surface app. It shows the model name of your Surface device and each Surface accessory.
Change the size of your desktop icons in Windows
Change the size of your desktop icons. To resize desktop icons, right-click (or press and hold) the desktop, point to View, then select Large icons, Medium icons, or Small icons.
Share your Microsoft 365 Family subscription - Microsoft Support
Learn how to share Microsoft 365 Family subscription benefits with up to five people. Manage invitations, devices, and people you've shared Office with.
Applies To:
Excel for Microsoft 365, Word for Microsoft 365, PowerPoint for Microsoft 365, Excel for Microsoft 365 for Mac, Word for Microsoft 365 for Mac, PowerPoint for Microsoft 365 for Mac, Microsoft 365 for home, Office for business, Microsoft account dashboard
查找 Windows 产品密钥 - Microsoft 支持
查找 Windows 7 或 Windows 8.1 的产品密钥. 卸载或重新安装 Windows 7 或 Windows 8.1 时，通常需要产品密钥。 通常，如果购买的是实物 Windows 拷贝，产品密钥应该在标签上或者在 Windows 随附包装盒中的卡上。
Applies To:
Microsoft account dashboard
SUMIFS function - Microsoft Support
How to use the SUMIFS function in Excel, one of Excel’s math and trig functions, to add arguments that meet multiple criteria.
Applies To:
Excel for Microsoft 365, Excel for Microsoft 365 for Mac, Excel for the web, Excel 2021, Excel 2021 for Mac, Excel 2019, Excel 2019 for Mac, Excel 2016, Excel Web App