Remote Assistance Support from Microsoft allows a Microsoft support professional in another location to view your computer screen and work on your computer over a secured connection.Protect yourself from tech support scams.

If you don't have an account, follow these steps to join. If you're having trouble joining a Teams meeting, try I can't join a Teams meeting . Note: For some meetings, admin settings prevent people who are not signed in from joining the meeting.

中国的身份验证方法. 中国仅提供有限的身份验证方法。 用户可以将 Authenticator 设置为在其设备上接收可用于验证其身份的验证码，而不是使用推送通知进行双重验证。

了解如何使用 Windows 上的 Game Bar 来捕获游戏过程、与好友聊天和跟踪成就。

即使已开启其他防火墙，开启 Microsoft Defender 防火墙也很重要。 它保护你免遭未经授权的访问。 若要打开或关闭 Microsoft Defender 防火墙，请执行以下操作：

解决安装 Windows SP1 时遇到的问题. 如果你尝试安装 SP1 并看到指示安装未成功的错误消息，这可能是因为用于安装更新的 Windows 维护服务商店出现问题，或者是因为你的防病毒软件阻止安装更新。

Under Delegate Permissions, set these five options to None: Calendar, Tasks, Inbox, Contacts, and Notes.Select OK.. Selecting None for each of these options gives the delegate the basic ability to send messages on your behalf, but nothing more. You can grant the delegate additional permissions (such as the ability to see your calendar or inbox) by selecting Calendar > Author or Inbox ...

First time, infrequent senders, or senders marked [External] - While it's not unusual to receive an email or Teams message from someone for the first time, especially if they are outside your organization, this can be a sign of phishing.Slow down and take extra care at these times. When you get an email or a Teams message from somebody you don't recognize, or that Outlook or Teams identifies ...

解决激活错误. 如果 Microsoft 365 无法激活，其最后会变为未授权，且 Microsoft 365 的所有编辑功能都会被禁用。 Microsoft 可能由于多种原因变为未授权。

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。