Learn how to manage your Microsoft subscription, including billing, renewal, and cancellation options.

A product key. A 25-character product key might be needed (not required for digital licenses). For help with finding the product key, go to Find your Windows product key.Many modern devices contain the product key embedded in the firmware of the device.

A BitLocker recovery key is needed when BitLocker can’t automatically unlock an encrypted drive in Windows. This key, which is a 48-digit number, is used to regain access to the drive.

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Note: The steps to install the 2019, 2016, or 2013 versions of Office Professional Plus, Office Standard, or a stand-alone app such as Word or Project might be different if you got Microsoft 365 through one of the following: Microsoft Workplace Discount Program (formerly known as Home Use Program): If you bought Microsoft 365 for personal use through your company, see Install Office through ...

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。

進一步了解有關 Xbox 數位代碼和禮品卡，以及如何疑難排解兌換內容的問題。

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

Office 365 U.S. Government G1 Project Online Essentials Visio Online Plan 1. Volume license versions of Office LTSC 2021, Office 2019, or Office 2016 Office Professional Plus

Xbox Game Pass Core conversion ratio: Any remaining time will convert to Xbox Game Pass Ultimate time at a ratio of 2:1 and be rounded up to the next full day.For example, 90 days remaining of Xbox Game Pass Core will convert to 45 days of Xbox Game Pass Ultimate time.