Learn how to sign in and create app passwords for Microsoft apps and devices that don't support two-step verification.

如何變更玩家代號？ 我們已將新的 Xbox 玩家代號更新為支援最多 12 個字元的 Unicode 玩家自選名稱，而此名稱還會在您分享玩家代號時加上自動產生的尾碼。 我們為玩家提供 13 個不同的字母系統，支援全球超過 200 種語言。

請在Word或 Excel (桌面) 簽名 當您簽署簽名欄時，會加上簽章的可見呈現和數位簽章。 在檔案中，右鍵點擊簽名欄並選擇 簽名。 如果檔案在受保護檢視中開啟，請選擇「 無論如何編輯」，前提是該檔案來自可靠的來源。 請執行下列其中一或多項操作： 若要新增印刷字體的簽章，請在 X 旁邊的方塊中 ...

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 It issues digital certificates, signs certificates to verify their validity and tracks which certificates have been revoked or have expired.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

Summary A BitLocker recovery key is needed when BitLocker can’t automatically unlock an encrypted drive in Windows. This is a 48‑digit number that lets you regain access to your drive.

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What is Secure Boot? Secure Boot is a security feature in Unified Extensible Firmware Interface (UEFI) based firmware that helps ensure that only trusted software runs during a device's boot (start) sequence. It works by verifying the digital signature of pre-boot software against a set of trusted digital certificates (also known as certificate authority or CA) stored in the device's firmware ...

iOS Android To install Authenticator on your iOS device Scan the QR code or download and install Authenticator from the Apple app store.

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More help If you're using a work or school account and couldn't install classic Outlook following the steps above, contact the IT admin in your organization for assistance.