Open encrypted and protected messages - Microsoft Support
Learn how to identify and open encrypted and protected emails no matter what email client you're using.
Applies To:
Outlook for Microsoft 365, Outlook for Microsoft 365 for Mac, Outlook 2024, Outlook 2024 for Mac, Outlook 2021, Outlook 2021 for Mac, Outlook 2019, Outlook 2019 for Mac, Outlook 2016, Outlook 2016 for Mac, Microsoft365.com, Outlook on the web, Outlook.com, Outlook for Mac 2011, Microsoft Office, New Outlook for Windows, Outlook for Android, Outlook for iOS, Outlook Web App
Digital signatures and certificates - Microsoft Support
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 It issues digital certificates, signs certificates to verify their validity and tracks which certificates have been revoked or have expired.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 ...
Applies To:
Excel for Microsoft 365, Word for Microsoft 365, PowerPoint for Microsoft 365, Access for Microsoft 365, Visio Plan 2, Excel 2024, PowerPoint 2024, Access 2024, Excel 2021, Word 2021, PowerPoint 2021, Access 2021, Visio Professional 2021, Visio Standard 2021, Excel 2019, Word 2019, PowerPoint 2019, Access 2019, Visio Professional 2019, Visio Standard 2019, Excel 2016, Word 2016, PowerPoint 2016, Access 2016, Visio Professional 2016, Visio Standard 2016
將安全性資訊新增至您的 Microsoft 帳戶 | Xbox Support
了解如何新增安全性資訊以保護您的 Microsoft 帳戶。
Secure messages with a digital ID in Outlook - Microsoft Support
Signing your email messages with a digital ID helps to prove your identity and prevent message tampering.
Applies To:
Outlook for Microsoft 365, Outlook 2024, Outlook 2021, Outlook 2019, Outlook 2016, New Outlook for Windows
如何在 Outlook 中新增和更改電子郵件簽名 - Microsoft 支援服務
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 ...
Applies To:
Outlook for Microsoft 365, Outlook 2024, Outlook 2021, Outlook 2019, Outlook 2016, Office for business, Office 365 Small Business, Outlook on the web, Outlook.com, My Office for iPhone, New Outlook for Windows, Outlook on the web for Exchange Server 2016, Outlook on the web for Exchange Server 2019
Xbox Status | Xbox Support
Check the Xbox services, games, and apps for any service outages.
How to spot a "fake order" scam - Microsoft Support
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 ...
關於 Xbox Game Pass 行動裝置版 | Xbox Support
自 2025 年 3 月 19 起,不再支援適用於行動裝置的 Xbox Game Pass。 取得有關在其他裝置上進行雲端遊戲的詳細資訊。
下载Microsoft Authenticator - Microsoft 支持
注意: Microsoft Authenticator 不适用于电脑或 Mac,因为出于安全原因,验证器应用通常用于智能手机。 了解详细信息。 Microsoft不再支持超过一年的 Authenticator 版本。 始终使设备保持最新状态。 从 2025 年 7 月开始,Authenticator 中的自动填充功能将停止工作,并且从 2025 年 8 月起,密码将不再可在 ...
如何将帐户添加到 Microsoft Authenticator - Microsoft 支持
可通过三种方式将 Microsoft Authenticator 与你的帐户配合使用: 添加 Authenticator 作为验证登录的一种方式。 这样,即使忘记了密码,也可以登录。 添加 Authenticator 作为每次登录的一种方式。 使用一次性密码代码可提高帐户安全性。 这称为 双重验证。 添加 Authenticator 作为 登录的唯一方式 - 只需点击 ...