重要: 如果你打开双重验证，你将始终需要两种形式的身份验证。这意味着如果你忘记了密码，你需要两种联系方式。 或者说，如果丢失了联系方式，你将无法仅通过密码进入自己的帐户，而可能需要等待 30 天才能重新访问， 你甚至可能失去对帐户的访问权限。

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If you choose the Do Not Forward option, there are two possibilities:. Microsoft Office attachments such as Word, Excel or PowerPoint files remain encrypted even after they’re downloaded. This means that if the recipient downloads the attachment and sends it to someone else, the person they forwarded it to won’t be able to open the attachment because they don’t have permission to open it.

如果公式引用了 Excel 中未定义的名称，则会看到 #NAME？ 错误。 请参阅以下引用 Profit 的 SUM 函数示例，该 函数是工作簿中未定义的名称。. 解决方案：在 名称管理器中定义一个名称，然后按照以下步骤将该名称添加到公式中：. 如果电子表格中已有数据，并且想要为特定单元格或单元格区域分配 ...

Try these steps if you’re having trouble buying apps, games, or downloads from the Microsoft Store.

重要事项 由于双重验证已打开，您需要两种形式的身份验证才能登录您的帐户。 如果您不再能够访问用于验证您帐户的电子邮件地址，您的安全信息不是最新的，或者您最近在过去 30 天内更新了安全信息，您可能无法访问您的帐户。

Protected messages allow the sender to set specific permissions on a message, such as Do Not Forward or Do Not Print. If you receive a protected email message sent to the work or school account you use with Microsoft 365 in Outlook or Outlook on the web, the message should open like any other message.

Make sure User Account Control (UAC) is turned on - When changes are going to be made to your PC that require administrator-level permission, UAC notifies you and gives you the chance to approve the change.UAC can help keep viruses from making unwanted changes. To open UAC, swipe in from the right edge of the screen, and then tap Search. (If you're using a mouse, point to the upper-right ...

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