After you export your contacts, use Excel to open the CSV file and check that there's data. When you close the file, Excel will prompt you a few times with "are you sure you want to save it in CSV format?"

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。

注意: 注册 Microsoft Teams（免费版）与使用工作帐户（通常由 IT 管理员分配为具有使用 Teams 许可证的组织的一部分）或学校帐户（作为学校或教育机构的一部分）不同。详细了解 Microsoft Teams（工作或学校）。

Voice typing. In Windows 11, dictation has been updated and renamed as voice typing. Like dictation, voice typing uses online speech recognition technologies to power its speech-to-text transcription service. You no longer need to turn on the Online Speech recognition setting to use voice typing.

We believe that Microsoft Teams (free) is a place where minors can interact safely to build on friendships and meaningful community. We also know that keeping online experiences safe and positive involves more than building in permission settings and controls.

如果麦克风功能出现问题，则以下信息可以帮助你排除故障和解决问题。 确保应用有权访问麦克风. 如果在更新 Windows 10 后未检测到麦克风，则表示你可能需要先授予应用相关权限才能使用它。

sumproduct 使用单元格区域 (或创建数组 公式) 作为参数 (公式的各个部分，使其) 。 它将数组中的项相乘，然后对结果进行汇总。 此示例是一个购物清单，其中一个数组列出每个商品的成本，另一个数组列出将购买的商品数量。

Important: If your device is out of support, it is no longer receiving security updates from Microsoft and may become more vulnerable to security risks and viruses.For this reason, we strongly recommend that you update to the latest version of Windows. Each version of Windows is supported for 18 months.

在新 Teams 中时，选择新 Teams 顶部的“设置”和“更多 ” ，然后选择“设置 > 通知”> 打开 Windows 通知设置，打开 (或关闭) 通知。 在应用列表中查找 Microsoft Teams (工作预览) 并设置首选项。 添加另一个 Teams 帐户

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