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

Learn how to install the Microsoft 365 Copilot mobile app on your iPhone or iPad and use the apps with Microsoft 365.

Find the official Microsoft licensing terms for Xbox and gaming applications for mobile devices and iPads.

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。

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 The message looks common enough, and it says that money will be charged to your credit card or withdrawn from your bank account for the ...

Xbox Support ... Xbox Support

Discover the differences between Microsoft 365 Copilot Chat and Microsoft 365 Copilot — explore features available with and without a license.

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 It issues digital certificates, signs certificates to verify their validity and tracks which certificates have been revoked or have expired.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

If you see error 0x82d60003, you need to use an Xbox-compatible accessory.

See how to view the details for signatures and certificates.