使用Outlook Web App中的“阻止”或“允许”设置来帮助控制不需要的电子邮件和未经请求的电子邮件。

With External Access for Teams, you can add or invite anyone outside of your Teams org who uses Teams, Teams for personal use, Skype (for consumers), and Skype for Business to a one-to-one chat.

Learn how to extend your PC's battery life using battery saver and other power-saving tips for Windows.

Learn how to change Internet Explorer settings, or reset browser settings when there's a problem.

Learn how to troubleshoot Windows Media Player errors. Explore resources for general help with Windows Media Player.

Learn how to keep your Microsoft account safe, including making a strong password, identifying safe emails, and reviewing account activity.

创建 VLOOKUP 或 HLOOKUP 函数时，输入单元格区域，例如 D2：F39。 该范围称为 table_array 参数， 参数 只是函数运行所需的一段数据。 在这种情况下，函数会在这些单元格中搜索你尝试查找的数据。 table_array参数始终是 VLOOKUP 或 HLOOKUP 函数中的第二个参数， (第一个参数是你尝试查找) 的值，如果没有它 ...

Note: If you don’t see the Change link, it may be because some information, such as your name, photo, or title, is collected from systems that your IT or human resources department control.If you want to update those details, contact your administrator. If you need help finding your administrator, see How do I find out who my admin is?

Discover how to boost your browsing speed and save battery life with Microsoft Edge's performance features, such as sleeping tabs and efficiency mode.

Add an email address or phone number to your Microsoft account and keep your current contacts, online storage, subscriptions, and account settings.