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How to Fix Office 2021 Not Activated: Redeem Your Product Key
Question details
The user's Microsoft Office 2021 installation shows as unactivated despite having a product key.
- Product
- Microsoft Office 2021
- Device & OS
- not provided
- Scenario
- Attempting to activate a new or existing Office 2021 installation using a purchased product key.
- Observed behavior
- Office 2021 remains unactivated because the product key has not been successfully redeemed and linked to the correct Microsoft account.
Ensure you have your 25-character product key ready and know the login details for the Microsoft account you want to associate with your Office license.
Redeem Product Key via the Microsoft Setup Page
The standard method for linking a new product key to your Microsoft account to activate Office 2021.
To activate Office 2021, you cannot simply enter the key into an unactivated desktop app. You must first link the 25-character product key to your official Microsoft account online.
Open your preferred web browser and navigate to setup.office.com.
Log in using the Microsoft account you want to permanently associate with your Office 2021 license. If you do not have one, click on the option to create a new account.
Type in your 25-character product key when prompted. You do not need to type the hyphens, as the system will format them automatically.
Select your correct country or region and your preferred language, then click Next.
Once redeemed, go to your Microsoft account's 'Services & subscriptions' page to download and install Office. When you open a desktop app like Word, sign in with this exact account to verify activation.
Troubleshoot Rejected or Invalid Product Keys
Steps to take if your product key fails to activate or displays an error code on the setup page.
Try WPS Office: A Free and Lightweight Alternative
If your Office 2021 product key is invalid or you are tired of dealing with complex activation issues, switch to WPS Office. It is a completely free, highly compatible alternative that requires no license keys to get your work done.
- 1. Download the installer: Visit the official WPS website and click the free download button for your operating system.
- 2. Install the software: Run the downloaded installation file and follow the straightforward on-screen prompts.
- 3. Open your files: Launch WPS Office and instantly open your existing Word, Excel, or PowerPoint documents without needing any product key.
Frequently Asked Questions
Can I activate Office 2021 without a Microsoft account?
No. For Office 2021, Microsoft requires you to redeem the product key to a Microsoft account at setup.office.com. This allows you to manage the license and download the software legally.
Why does my Office 2021 say 'Unlicensed Product' after I successfully entered the key online?
This usually happens if you redeemed the key online but haven't signed into the Office desktop application with the same Microsoft account. Open any Office app, go to File > Account, and sign in with the correct credentials.
What should I do if I bought a cheap product key online and it doesn't work?
Keys sold separately for unusually low prices are often from unauthorized sellers. If the key fails to activate, you must contact the seller for a refund. Microsoft will not replace compromised keys purchased from unofficial sources.
