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

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 It issues digital certificates, signs certificates to verify their validity and tracks which certificates have been revoked or have expired.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

Need help setting up an Xbox profile or signing in to Xbox on your console, PC, or mobile device? This solution will help you sign in or create a new account.

免費試用版有哪些限制? 免費試用版適用於《Final Fantasy XIV》的新使用者，且無需有效的訂閱，即可遊玩。 在沒有遊玩時間限制下，體驗來自擴展遊戲《Final Fantasy XIV: 新生艾奧傑亞》、《Final Fantasy XIV:蒼天的伊修加爾德》和《Final Fantasy XIV: 紅蓮的解放者》的主要情境任務和內容。 不過，某些遊戲內 ...

Contact Microsoft Support. Find solutions to common problems, or get help from a support agent.

Trying to sign you in Cancel

Hotmail is now Outlook.com. Learn how to sign in to access your Outlook.com, Hotmail, Live, or MSN email account.

获取将数字 Xbox 游戏或订阅作为礼品发送给他人时遇到的问题的帮助。

访问 Microsoft 官方支持网站，获取全球范围内的产品和服务帮助，解决技术问题并提高生产力。

Xbox Support ... Xbox Support