A popular tactic of criminals is the "fake order" scam. The way it works is that you get a message, usually in email or text, that appears to be a routine confirmation for an order. Of course, you never ordered whatever product or service it's confirming. The message looks common enough, and it says that money will be charged to your credit card or withdrawn from your bank account for the ...

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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 It issues digital certificates, signs certificates to verify their validity and tracks which certificates have been revoked or have expired.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 ...

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Learn how to set up your user account for multifactor authentication with Microsoft 365.

About digital signatures and certificates in Office, and buying a digital certificate from a certificate authority or create your own.

Unlock faster task management with Microsoft 365 Copilot in this video guide. Linked to your Microsoft 365 account, enjoy seamless access in-app, on the web, or on the move.

Registering a device gives your phone access to your organization's services but doesn't allow your organization access to your phone. If you're an administrator, you can find more information in Configure and enable users for SMS-based authentication. If your organization hasn't made SMS sign-in available, you won't see an option for it when registering a phone with your account. When you ...

Copilot in Microsoft Teams meetings helps you capture and share the key points, action items, and outcomes of your online meetings.

持续时间：2 分 19 秒 了解如何使用 Microsoft 365 Copilot 更智能、更快速地完成工作。 你的 AI 助手与 Microsoft 365 帐户同步，随时可在任何设备上提供帮助，让你永不错过任何内容。 Microsoft 365 Copilot 入门 观看更多视频