A digital signature attached to an email message offers another layer of security by providing assurance to the recipient that you—not an imposter—signed the contents of the email message. Your digital signature, which includes your certificate and public key, originates from your digital ID. And that digital ID serves as your unique digital mark and signals the recipient that the content ...

Xbox Support ... Xbox Support

瞭解如何在行動裝置、Windows 裝置或 Xbox 主機上兌換 Microsoft/Xbox 禮品卡或其他代碼。

如何兌換禮品卡、Xbox 下載代碼或權杖 Microsoft 和 Xbox 禮品卡、下載代碼和令牌的運作方式相同：兌換到您的 Microsoft 帳戶後，您可以在 Microsoft Store 網路商店、Windows 或 Xbox 上花費餘額，並且您可以下載最新的應用程式、遊戲、電影和電視節目。 在大多數國家或地區，您也可以購買 Surface、Xbox 和配件 ...

Find out how to submit a request for a refund for a purchase of digital Xbox content.

The Microsoft Authenticator app helps you sign into your accounts when you're using two-step verification.

Learn how to use mobile operator billing as a payment option to buy Xbox subscriptions, games, and other content.

Learn how to manage your Microsoft 365 subscription and billing if you purchased it through a third-party retailer.

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 ...

Xbox has partnered with NVIDIA GeForce NOW and Boosteroid to bring first-party titles to more players. If you own any of the supported Xbox games on Steam and have an account to either streaming service, you can play your game in the cloud from anywhere. Just make sure that you link your Steam account to either NVIDIA GeForce NOW or Boosteroid.