If you receive a message stating that this product key has already been used, it usually means that Microsoft has detected the product key has already been redeemed or activated.
In many cases, this doesn't mean your license is invalid. The key may already be linked to your Microsoft account, or Office may simply need to be activated using the correct account.
💡 Before You Begin
Before starting, make sure you have:
✅ Your Microsoft product key
✅ A stable internet connection
✅ Access to the Microsoft account you may have used previously
✅ Administrator access to your PC (if required)
Step 1 – Check if the Product Is Already Linked to Your Microsoft Account
Many Microsoft Office retail licenses can only be redeemed once. After redemption, the product key becomes permanently associated with the Microsoft account used during setup.
Sign in using the Microsoft account you may have used when redeeming the product key.
Check whether your Office product appears under Services & subscriptions.
If your product is listed, you do not need to redeem the product key again.
Simply install Office from your Microsoft account.
Step 2 – Try Your Other Microsoft Accounts
If you have more than one Microsoft account, the product may be linked to a different one.
Sign in with any Microsoft accounts you commonly use and check Services & subscriptions for your Office license.
Step 3 – Verify You're Redeeming the Correct Product Key
Make sure you're redeeming the correct type of product key.
For example:
Windows product keys cannot be redeemed as Microsoft Office licenses.
Microsoft 365 subscription keys differ from Office 2024 perpetual licenses.
Office product keys must be redeemed on the correct Microsoft redemption page.
Step 4 – Install Office Instead of Redeeming the Key Again
If the license already appears in your Microsoft account:
Select Install next to your Office product.
Download and install Office.
Open any Office application and sign in using the same Microsoft account.
Office should activate automatically.
Step 5 – If You Purchased from EM Digital Group
If you're unable to locate the license in any Microsoft account, please contact our support team and include:
Your order number
A screenshot of the error message
The Microsoft account email address(s) you have checked (you may partially hide the email address for privacy)
We'll verify your purchase and help you determine the next steps.
Still Need Help?
If the problem continues after following the steps above, please contact EM Digital Group Support with:
Your order number
A screenshot of the error
The Microsoft account email address used during redemption (if known)
Our team will review your license and assist you further.