If you get an email from Microsoft account team and the email address domain is @accountprotection.microsoft.com, it is safe to trust the message and open it. Microsoft uses this domain to send email notifications about your Microsoft account. These notifications can include security codes for two-step verification and account update information, such as password changes. You can check the ...

The Microsoft Authenticator app helps you sign into your accounts when you're using two-step verification.

Learn how to find a Windows product key for activation, and when you'll use a digital license instead.

准备好安装 Microsoft 365 或 Office 2024 了吗？ 在开始之前，请确保电脑或 Mac 满足 系统要求。 如果已兑换产品密钥、重新安装应用，或者已通过工作或学校分配了许可证，则可以跳到登录部分 ，下载并安装 Microsoft 365 或 Office。 但是，如果是 首次 安装 Microsoft 365 或 Office，可能需要先执行一些步骤 ...

If your purchase of Office or Microsoft 365 came with a product key, you enter your product key on one of the websites listed below for your product. After you enter your key, you can download and install Office, or you can renew your Microsoft 365 subscription. Having problems with your product key?

Learn how to activate Office that is pre-installed on new Windows 10 PCs or using a new product key.

Training: Get started with SharePoint in Microsoft 365. At office.com, sign in to SharePoint, then select the SharePoint tile.

如何激活预安装在新 Windows 10 计算机上的 Office 或使用新的产品密钥。

注意: 请注意，Surface 商业设备的支持案例只能 联机 启动。 对于批量许可支持，请打开Microsoft 365 管理中心，选择“ 帮助 & 支持 ”，并搜索“管理批量许可”或提交 联机支持请求。 请不要忘记包括你的许可证 ID 或协议编号、你的联系人电话号码 & 电子邮件地址，以便我们可以联系你。 如果已有 ...

Need help with an Xbox console, an Xbox game, or Xbox network? Find out how to get in touch with us.