Xbox Support offers help for Xbox, Game Pass, and billing questions. Get advice and customer service in the Xbox Support community.

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。

Banks in the countries and regions of the European Economic Area are required to verify the identity of the person making an online purchase before the payment can be processed. This verification requires multi-factor authentication to help ensure your online purchases are secure and protected.

全部展開 將安全性資訊新增至您現有的 Microsoft 帳戶 建立您的 Microsoft 帳戶時新增安全性資訊

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 It issues digital certificates, signs certificates to verify their validity and tracks which certificates have been revoked or have expired.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

Xbox Support offers help for Xbox, Game Pass, and billing questions. Get advice and customer service in the Xbox Support community.

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

Microsoft 支援服務在此協助您處理 Microsoft 產品。 尋找適用於 Microsoft Copilot、Microsoft 365、Windows 11、Surface 等的使用方法文章、影片和訓練。

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 ...

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