When you share copies of Microsoft 365 document files with clients or colleagues, it's a good idea to review the document for hidden data or personal information and remove it.

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

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 It issues digital certificates, signs certificates to verify their validity and tracks which certificates have been revoked or have expired.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

Use a ready signature template from a gallery to create your email signature in Outlook.

Use the Information Protection viewer to view protected files in Windows, Android, iOS, or Edge.

How to create or edit your Outlook signature for email messages. Include your signature, text, images, electronic business card, and logo.

在 Outlook 中查找电子邮件地址？ 使用 "搜索通讯簿" 框。

无密码是下一代帐户安全性。 简单、快速、安全。 如果我的帐户没有密码，我将如何登录？ 从帐户中删除密码后，需要使用无密码方法登录，例如 Microsoft Authenticator 应用、 Outlook for Android 、Windows Hello、物理安全密钥或短信代码。

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 ...

摘要 Email 簽名能在你的商業溝通中建立專業一致性，並確保收件人在每則訊息中都擁有你的聯絡資訊。 在Outlook中，你可以為不同用途設定多個簽名 (內部與外部、個人與商務) ，並選擇是否自動包含在新郵件、回覆或轉寄中。 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 ...