So what do you do if you need to reinstall the program but you've lost this important, 25-digit installation code? Visit the dedicated forum to share, explore and talk to experts about Microsoft Teams.Microsoft Office 2021, 2019, 20, like all versions of Office and most other programs you pay for, requires that you enter a unique Product Key during the installation process, proving, to a point, that you own the software. If you have feedback for TechNet Subscriber Support, Click here to learn more. Please remember to mark the replies as answers if they helped. Select the link Sign in with your other Microsoft account, and then sign in with the correct Microsoft account.On the My Office Account page, you'll see a portion of the Microsoft account you used to buy or activate Office, or that you used when you first signed in to.After signing in, type the 25-character key that came with your Office home and business 2016.Go to Enter your Microsoft account or follow the prompts to create a new one.
Please try the following steps to check if this product key has been associated with another Microsoft account: Please please help!! I'm terribly distressed! How can my product key been in use when I just newly bought it from a credible IT company?! I'm from Indonesia and I bought my product from one of the Challenger outlets. but when i used this product key, this product key can't be used with message "product key has been already used" ( i never used this product key before).
I bought product key for office home and student 2016 version (without cd).
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