In the Microsoft 365 Copilot app you can upload or create files, ask questions, collaborate on AI-generated content, set up agents that help you be more productive, and add a wide array of custom agents and apps.

With two-step verification, you'll get a security code to your email, phone, or authenticator app every time you sign in on a device that isn't trusted. Need more help?

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

在Outlook中，你可以為電子郵件建立一個或多個個人化簽名。 你的簽名可以包含文字、連結、圖片和圖片 (，例如你的手寫簽名或標誌) 。

Before you can use Authenticator as a way to sign in, you need to download the app and have already added Authenticator to your accounts. Starting July 2025, the autofill feature in Authenticator will stop working, and from August 2025, passwords will no longer be accessible in Authenticator.

Learn more about what data is collected with Copilot feedback for Microsoft 365 apps.

Contact Microsoft Support. Find solutions to common problems, or get help from a support agent.

Learn how to add all your different accounts to the Microsoft Authenticator app.

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

A phishing email is an email that appears legitimate but is actually an attempt to get your personal information or steal your money. Some deceptive emails appear to be from a safe sender but, in fact, have a "spoofed" source address to fool you. Here are some ways to deal with phishing and spoofing scams in Outlook.com. Spoof intelligence in Exchange Online Protection helps prevent phishing ...