ms office 계정 변경 방법

Hello

The key you bought is not really a license key, it is the code that allows you to redeem it, so it can be tied to a Microsoft account.

The mistake here was, you let your employee redeem it to their Microsoft account. Once redeemed, the key is invalid, because moving forward, the Microsoft account is the digital license.

Microsoft doesn't allow account switching once redeemed normally. However, I will suggest that you contact support, explain the situation, provide purchase proof, and other documentation. See if they are willing to make an exception for you.

Go to https://support.microsoft.com/contactus, Type "Billing" and press Enter. On the next screen, click "Contact support" at the bottom of the page, then choose "Microsoft 365" > "Manage my subscription". You’ll then see the option to chat with a Microsoft support agent who has access to your account to help review the issue.