MSO License not working

Please provide full details on the problem you are experiencing.

Where did you purchase the Office licence, was that from an online retailer, and what version of Office is that for, is it Office Home 2024, Office Pro Plus 2024 or a subscription to Microsoft 365.

Also, please provide a screenshot of the problem you are seeing indicating a problem with the Office licence.

If the Microsoft Office (MSO) product key is not working, the supported options depend on how the key was obtained and what error is shown.

1. If the key was bought separately from the software (card, email, third‑party site)
   • Keys sold on their own are often stolen or fraudulently obtained and later blocked.
   • If the key is rejected or shows as invalid/blocked when trying to redeem at Office.com/setup, contact the seller and request a refund. Microsoft specifically warns that such keys may be counterfeit or unauthorized and can be disabled.
2. If the key was lost or damaged
   • If there is valid proof of purchase, Microsoft Support may be able to replace the key or offer other options. Use the Microsoft support contact page to request help.
3. If the key was accepted online but Office still shows Unlicensed / Not activated
   • Follow the activation troubleshooting steps for “Unlicensed Product and activation errors in Office,” including checking antivirus and proxy settings that may block activation.
   • If activation still fails after following those steps, contact Office support from the same article.
4. If the product name includes “Professional Plus” or “LTSC Professional Plus 2024” and was bought as a one‑off license
   • These are volume licenses intended for organizations and are not sold to individual consumers.
   • Such keys are often resold illegally; they can be blocked or hit activation limits.
   • In that case, the remedy is to dispute the purchase and request a refund from the seller.
5. If none of the above resolves the issue
   • Use the Microsoft Support page to contact support directly about the product key and provide proof of purchase and the exact error message.

References:

• Where to enter your Office product key
• Using product keys with Microsoft 365
• Find your product key for Office 2010
• Unlicensed Product and activation errors in Office
• Users might receive a Product Deactivated error in Microsoft 365 Office apps
• Contact volume licensing support