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 ...

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

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 It issues digital certificates, signs certificates to verify their validity and tracks which certificates have been revoked or have expired.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

連絡 Microsoft 支援服務。尋找常見問題的解決方案，或向支援專員尋求協助。

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Two-step verification is an optional security feature that, by using two forms of identity—your password, and a contact method (also known as security info)—makes it harder for someone to break into your Microsoft account.

Learn more about the different ways that you're notified of an Xbox enforcement action and where you can get more info about it.

Errors CAA2000B, 4usqa, and 49dvs when trying to sign in to classic Outlook and Outlook for Mac

Learn more about Xbox device suspensions and get answers to some of your questions.

Learn how to identify and open encrypted and protected emails no matter what email client you're using.