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 It issues digital certificates, signs certificates to verify their validity and tracks which certificates have been revoked or have expired.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

若要在 Apple 设备上使用 Xbox Cloud Gaming，请按照以下步骤操作或观看视频： 视频说明 有关云游戏和要求的详细信息，请访问： 如何使用云游戏

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

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

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

If you see error 0x87E1000C, wait for your Xbox to finish installing the game or app. Find more solutions here.