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。

Signing your email messages with a digital ID helps to prove your identity and prevent message tampering.

After launching an Office app, you might receive a message that says Get genuine Office.. If you see this, we've determined that the Office product installed on your device isn't legitimate and you may be a victim of software counterfeiting.

Learn how you can use the free Microsoft Authenticator app to sign in to all your accounts without using a password.

Learn more about Xbox device suspensions and get answers to some of your questions.

需要 Xbox 主機、Xbox 遊戲或 Xbox 網路的協助嗎? 了解如何與我們連絡。

Learn about Xbox online safety so you can manage your family's accounts.

了解如何从 Microsoft Office 应用中搜索和打开文件。 使用快捷方式浏览最近打开的文件和文件夹。

Find out how to submit a case review and learn more about your Xbox enforcements.

Learn about the benefits of using a PIN to help keep your account secure on Xbox.