联系 Microsoft 支持人员。查找常见问题的解决方案，或从支持专员那里获取帮助。

Copilot 聊天中的工作模式和 Web 模式有何区别？ 使用 Microsoft 365 Copilot 许可证， Copilot 用户界面顶部的开关允许在工作和 Web 数据中的地面提示之间切换。 这两种模式都提供生成式 AI 服务，但它们可提供不同的用途来帮助你提高工作效率。

Learn how to sign in and create app passwords for Microsoft apps and devices that don't support two-step verification.

Want to add a padlock to your email messages? You can use encryption and digital signatures in new Outlook, classic Outlook, and Outlook on the web for work or school accounts to increase the security of messages. Encrypting an email message in Outlook means it's converted from readable plain text into scrambled cipher text. Only the recipient who has the private key that matches the public ...

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

Certificate authority (CA) A certificate authority is an entity similar to a notary public. It issues digital certificates, signs certificates to verify their validity and tracks which certificates have been revoked or have expired. Top of Page Digital signature assurances The following terms and definitions show what assurances are provided by digital signatures. Authenticity The signer is ...

摘要 Email签名在业务通信中创造专业一致性，并确保收件人在每封邮件中都有你的联系信息。 在Outlook 中，可以设置多个签名， (内部与外部、个人与业务) 的不同用途，并选择是自动将其包含在新的电子邮件、答复还是转发中。 签名可以包括文本、链接、图片和图像 (，例如手写签名或徽标 ...

If you sign in to your account while traveling or if you install a new app that signs in with your account, you may get an alert. We just need you to provide a security code so we know it was you, and that your account is safe.

下载Microsoft Authenticator Microsoft Authenticator 是一个移动应用，可帮助你在不使用密码的情况下登录到所有帐户。

获取 Microsoft 365 的支持、帮助和学习资源。 使用 Microsoft 365 让你的生活井然有序、扩展你的创造力并保护重要信息。