Message recall is available after you select Send and is available only if both you and the recipient have a Microsoft 365 or Microsoft Exchange email account in the same organization.Messages sent to or from a Hotmail, Gmail, or live.com account can't be recalled.

在 https://teams.microsoft.com 查找 Web 上的 Teams。 若要使用 Teams，需要一个具有商业或企业 Microsoft 365 许可证计划的 Microsoft 365 帐户。 有关详细信息，请参阅如何访问 Microsoft Teams。 有关 Web 上 Teams 支持的浏览器的信息，请参阅 Microsoft Teams 的 Web 客户端。

After you create your drop-down list, make sure it works the way you want. For example, you might want to check to see if Change the column width and row height to show all your entries.. If the list of entries for your drop-down list is on another worksheet and you want to prevent users from seeing it or making changes, consider hiding and protecting that worksheet.

如果你认为有人可能未经授权访问你的帐户，我们可以通过从所有受信任的设备注销来保护你。 在 24 小时内，你将注销浏览器、应用以及你的帐户用于登录的任何其他位置（Xbox 主机除外）。

Unlike in previous versions of Windows, you’ll need to use the media creation tool to create an ISO file to install Windows 10. Make sure you have a license to install Windows 10, and then follow these steps:

If the self-help answers don't resolve your issue, try a different search, or scroll to the bottom of the Help pane and, under Still need help?, select Yes.

如果您不确定如何进行必要的更改以启用 UEFI/BIOS，建议您查看电脑制造商在网站 上的支持信息。下面是一些指向某些电脑制造商的信息的链接，可帮助你入门： Dell Lenovo HP 虽然将 Windows 10 设备升级到 Windows 11 的要求只是电脑 ...

Microsoft Teams (免费) 入门。 浏览选项、了解新增功能、浏览帮助主题等。 按“提交”即表示你的反馈将用于改进 Microsoft 产品和服务。 你的 IT 管理员将能够收集此数据。

Windows Photo Viewer isn't part of Windows 10, but if you upgraded from Windows 7 or Windows 8.1, you might still have it. To check, press and hold (or right-click) a photo in File Explorer, and select Open with.If Windows Photo Viewer isn't in the list, you cannot install it on Windows 10.

了解如何安装 Windows 7 Service Pack 1 (SP1)。 包含有关如何获取下载、要求和其他内容的信息。 备份重要文件 在安装更新之前，最好将重要的文件、照片和视频备份到外部硬盘、U 盘或云端。