Check your computer's date settings. Excel uses your computer's date system. If a cell's date isn't entered using the same date system, Excel won't recognize it as a true date.

下面的步骤介绍如何更改 已知 密码。 如果你因忘记密码而需要 重置 密码，请参阅 重置 Microsoft 帐户密码 。. 更改密码. 转到 account.microsoft.com，如果你尚未登录，则使用要更新的帐户的用户名和密码登录。

How to track changes in Word using revision marks. Accept, reject, or hide changes made by others working in the file.

为什么需要验证码？ 当你登录到你的 Microsoft 帐户时，我们可能会要求提供其他证明，证明确实是你的帐户。 最多可以添加 10 种不同的方法来验证登录，并且可以选择：

使用文件共享、云服务或其他解决方案发送大型文件，以便在 Outlook 中解决文件大小限制。

重要: Microsoft不再支持超过一年的 Authenticator 版本。始终使设备保持最新状态。

Find out how to submit a request for a refund for a purchase of digital Xbox content.

With Microsoft Forms, you can create an instant, real time poll in seconds in Microsoft Teams. Post a poll in your Teams channel or quickly gather feedback in a chat pane.

If you want to track your Microsoft Rewards order after you redeem an award, sign in to the Rewards page with your Microsoft account, select Redeem and then select Order history.On the Order history page, find your order and then look under Status.. Open Rewards dashboard

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