Signing your email messages with a digital ID helps to prove your identity and prevent message tampering.

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 It issues digital certificates, signs certificates to verify their validity and tracks which certificates have been revoked or have expired.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

In Outlook, you can create one or more personalized signatures for your email messages. Your signature can include text, links, pictures, and images (such as your handwritten signature or a logo).

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) 。

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Find out how to troubleshoot issues redeeming Xbox digital codes and gift cards.

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。

To learn about digital signatures (also known as digital ID), what they can be used for, and how to use them in Word, Excel, and PowerPoint, see All about digital signatures. Create a signature line in Word or Excel (desktop) In the document or worksheet, place your pointer where you want to create a signature line. On the Insert tab, select Add a Signature Line in the Text group. In the ...

請依照此頁面上的步驟變更Microsoft帳戶電子郵件地址或電話號碼， (也稱為您用來登入的帳戶別名或用戶名稱) 。

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