查找 Windows 7 或 Windows 8.1 的产品密钥. 卸载或重新安装 Windows 7 或 Windows 8.1 时，通常需要产品密钥。 通常，如果购买的是实物 Windows 拷贝，产品密钥应该在标签上或者在 Windows 随附包装盒中的卡上。

Learn how to redeem your Microsoft Rewards points for a huge variety of great products and sweepstakes.

The dial pad can be used like a typical phone to make a call to a phone number. (You can also type in names or groups.) To dial a number from Teams, go to Calls, and then enter the number of the person you want to reach by using the dial pad located on the left. Then click Call.

Learn how to create a team from scratch in Microsoft Teams with step-by-step instructions and tips for managing teams and groups.

如果 Excel 网页版 Web 浏览器中运行，可以： 在同一文件上同时与他人共享和协作处理工作簿。

与其他人共享 Excel 工作簿 文章; 通过共同创作功能同时协作处理 Excel 工作簿 文章; 在 Excel 中共同创作的最佳做法

Learn how to use phone calls as a verification method for your Microsoft account. Follow the easy steps to enhance your security and access your apps and services.

在 Outlook 中设置外出或自动回复之前，你需要知道自己的 Outlook 帐户类型。你需要遵循的步骤取决于你拥有的是 Microsoft Exchange Outlook 电子邮件帐户还是 IMAP 或 POP3 帐户；前者在你通过组织（例如办公地点）获得电子邮件的情况下使用，后者在你具有 Yahoo 或 Gmail 等个人电子邮件帐户的情况下使用。

Stay in the loop with Microsoft Teams' status notifications. This article shows you how to get notified when someone's status changes, so you know when your colleagues are available, busy, or away. Learn how to customize your notification settings to suit your needs and never miss an important message again.

Microsoft doesn't make or support Outlook Express anymore. But the Mail Migration add-on can help you move your email and contacts over to Outlook.com. The add-on automatically moves your email and contacts, and you can keep your current email address.