To protect your account, the Outlook.com team won't be able to help if you're having problems signing in. Use the Microsoft account sign-in helper to get back into your account. Get help signing in.

If your system is asking you for your BitLocker recovery key, the following information may help you locate your recovery key and understand why you're being asked to provide it. Important: Microsoft support is unable to provide, or recreate, a lost BitLocker recovery key.

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

Get help and training for Office products, such as Word, Excel, PowerPoint, and Outlook. Learn tips and tricks, troubleshoot issues, and access online resources.

Add or remove a digital signature in Office files. Get a digital ID. Find digital ID or digital signature services. About digital signatures and certificates in Office, and buying a digital certificate from a certificate authority or create your own.

尝试在 Xbox 主机上进行购买时看到以下错误消息： 已阻止您的账户在 Microsoft Store 中进行购买。 有关详细信息，请转到 Xbox.com/PurchaseBlock

Follow these steps to reset your Microsoft account password. Follow the steps on this page to change the Microsoft account email address or phone number (also known as your account alias or username) that you use to sign in.

To find a customer service phone number in your country, please click a region and find your country. Note: Support cases for Surface devices may only be initiated online.

Help Microsoft stop scammers, whether they claim to be from Microsoft or not, by reporting tech support scams at: www.microsoft.com/reportascam. You can also report unsafe websites in Microsoft Edge by selecting Settings and More > Help and Feedback > Report unsafe site when you encounter something suspicious.

如果所购买的 Office 或 Microsoft 365 随附有产品密钥，请在你的产品所对应的下列网站中输入产品密钥。 输入密钥后，便可以下载并安装 Office，或可以续订 Microsoft 365 订阅。