Contact Us - Microsoft Support
Contact Microsoft Support. Find solutions to common problems, or get help from a support agent.
Account & profile | Xbox Support
Find everything you need to manage your Microsoft account, Xbox profile, and more.
Digital signatures and certificates - Microsoft Support
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 It issues digital certificates, signs certificates to verify their validity and tracks which certificates have been revoked or have expired.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 ...
Applies To: Excel for Microsoft 365, Word for Microsoft 365, PowerPoint for Microsoft 365, Access for Microsoft 365, Visio Plan 2, Excel 2024, PowerPoint 2024, Access 2024, Excel 2021, Word 2021, PowerPoint 2021, Access 2021, Visio Professional 2021, Visio Standard 2021, Excel 2019, Word 2019, PowerPoint 2019, Access 2019, Visio Professional 2019, Visio Standard 2019, Excel 2016, Word 2016, PowerPoint 2016, Access 2016, Visio Professional 2016, Visio Standard 2016
Turn off two-step verification | Xbox Support
Two-step verification is an optional security feature that, by using two forms of identity—your password, and a contact method (also known as security info)—makes it harder for someone to break into your Microsoft account.
工作或学校帐户双重验证的常见问题 - Microsoft 支持
你可能会因异常活动而被阻止。 Microsoft通过评估每次登录、注册或客户互动的可信度和可信度来保护你、你的帐户和我们的服务。 如果你的作触发了警报或与典型模式明显偏差,我们可能会将其解释为潜在风险行为,从而导致我们不会发送代码的临时阻止。 可能会有来自你的地理位置 的严重受损 ...
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故障排除 Microsoft 驗證碼問題 - Microsoft 支援服務
摘要 本文解釋了為什麼 Microsoft 的驗證碼不一定能送達。 其中包含最常見的原因清單,以及每種原因的解決方案。 驗證碼不一定能及時送達的原因 請閱讀以下最常見的原因清單,看看是否有適用於你的問題,或使用我們的故障排除工具來指導你。 開始
Applies To: Microsoft365.com, Microsoft 365 admin, Microsoft 365 Apps for business, Microsoft account dashboard, Microsoft Teams small business
請與我們連絡 | Xbox Support
需要 Xbox 主機、Xbox 遊戲或 Xbox 網路的協助嗎? 了解如何與我們連絡。
使用 Microsoft Authenticator 登入 - Microsoft 支援服務
使用 Authenticator 登入 如果您已開啟帳戶的無密碼、雙步驟或多重要素驗證,請使用下列步驟登入: 移至您要登入的網站。 在登入提示中輸入您的使用者名稱,然後選取 [下一步]。 選 取 [傳送通知]。
Protect yourself from tech support scams - Microsoft Support
Learn how to protect your PC, identity, and data from tech support scams.