Perpetual License purchased in 2021 now says Word and Excel are not activated, but PowerPoint is still OK

Eric S 20 Reputation points
2026-10-28T18:16:38.44+00:00

Purchased a perpetual Microsoft Office 2021 subscription. All worked fine until this week. Now when Word or Excel is opened it says "Action required: we've detected a 1-time purchased license. This license can only be used with Microsoft 365 apps downloaded directly from micr..." And when I look at the About tab it says the product is not activated.

HOWEVER, Microsoft Powerpoint works fine, and the About button provides the long product key.

Why is there a disconnect? Searching suggests I login to the Microsoft account I purchased the Office bundle from, delete the current Office suite, and reinstall. But I bought this in 2021 from Costco or Wallmart as I recall and they just sent me a link of some type to install the product.

Is there a way I can use the working PowerPoint key to reenable the Word and Excel programs?

Thanks for the help!

Microsoft 365 and Office | Install, redeem, activate | For home | MacOS
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Answer accepted by question author
Lychee-Ng 30,400 Reputation points Microsoft External Staff Moderator
2026-10-29T05:57:55.4433333+00:00

I know how confusing this seems, Eric S.

The AI answer actually has covered the basic: you unfortunately can't use a single Office application (like PowerPoint) to activate others (Word and Excel). When you bought Office, the setup link had you redeem the key and link it to a Microsoft account. So what matters is to confirm you still have it. Please try:

  1. Remove the Office license with the removal tool and fully uninstall Office.
  2. Sign into: account.microsoft.com/services > find your Office 2021 edition > Install.
  3. Run the downloaded package > open an Office app > sign in with your Microsoft account.
  4. You can also check with the Activation portal if needed: https://visualsupport.microsoft.com/ 
  5. Sign in with your Microsoft account > select your product > follow the instructions > Activate. 

Note: If you don't see your license, check other accounts. If it's nowhere to be found, your license might not be as legit as it's supposed to. You would need to contact the original seller, but since it's been so long, the chance of getting support from them might be low.

On that note, I must add, other community members have also reported that their Office 2021 license gone missing recently. Although it's unusual that your PowerPoint still works, the timing and the fact that you're also on a Mac suggest you might be experiencing the same thing. If your Office apps are still not activated after the above checks:

  1. Remove Office license and uninstall it as instructed in step 1 above.
  2. Visit Update history for Office for Mac > download older package (e.g. 113.x version)
  3. Open Word / Excel and sign in with the Microsoft account you used to redeem Office 2021 license.
  4. After that, turn off automatic updates for now so Office doesn't go back to newer edition.

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Office 2021 has reached end of support, but if your license is genuine it should still work. I hope the suggestions above help you get your Office apps back to working.

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  1. AI answer

    2026-10-28T18:17:41.17+00:00

    The exact “We’ve detected a one-time purchase license” banner means Word and Excel are Mac App Store builds, which cannot use your perpetual Office 2021 license; remove the Office apps and reinstall the Office 2021 package directly from Microsoft.^1^

    Reinstall the compatible Office 2021 apps

    1. Close Word, Excel, PowerPoint, and Outlook.
    2. Open Finder → Applications.
    3. Control-click each installed Office app—including the currently working PowerPoint—and select Move to Trash.
    4. Download the official Office 2021 for Mac Installer.
    5. Open the downloaded package and complete the installation.
    6. Launch Word or Excel and sign in using the Microsoft account associated with the original Office 2021 purchase.
    7. Confirm that About Word or About Excel now reports the product as activated.

    Removing PowerPoint too avoids retaining a mixture of App Store and direct-from-Microsoft Office applications. Microsoft documents that App Store copies enter reduced-functionality mode with a one-time license, while directly downloaded copies support perpetual activation.^1^

    The PowerPoint value cannot reactivate Word and Excel

    The full Office 2021 product key is not displayed inside Office. The long value shown by About PowerPoint therefore should not be treated as the reusable suite key. After initial redemption, the Microsoft account associated with Office replaces the product key for activation and reinstallation.^2^

    To identify the account:

    • In an Office application, open File → Account.
    • Look for the email address beside Belongs to.
    • Sign in to the Microsoft account’s Services & subscriptions page with that address and check whether Office 2021 appears there.

    For a retail copy, the original key was normally redeemed once and linked to a Microsoft account. Re-entering an already redeemed key is unnecessary; subsequent installations use that account.^3^

    If the account is unclear, search all likely email inboxes for the retailer’s 2021 order, Microsoft redemption confirmation, or messages containing “Office 2021.” The Costco/Walmart account used for payment is not necessarily the Microsoft account used when the key was redeemed.

    If the Microsoft installer still reports no license

    Only after locating the correct account, clear the Mac’s stored licensing data:

    1. Quit every Office application.
    2. Download and run Microsoft’s license removal tool.
    3. Open the .pkg from Downloads, select Continue, and then Install. A Mac administrator password may be required.
    4. Reinstall Office 2021 if necessary.
    5. Open Word or Excel and sign in with the Microsoft account holding the one-time purchase.
    6. Restart the Mac after activation.

    The tool removes all locally stored Office licenses, so do not run it until the account credentials associated with the purchase are available.^4^

    Office 2021 has now reached end of support, but that does not convert a perpetual license into a Microsoft 365 subscription.^5^

    References

    1. Microsoft Office activation and the Mac App Store | Microsoft Support
    2. Using product keys with Microsoft 365 | Microsoft Support
    3. [Office 2016 for Mac](https://support.microsoft.com/office/lifecycle/officeinstall/download-and-install-or-reinstall-office-2021-office-2019-or-office-2016#learn-more-about-product-keys,-workplace-discount-program,-and-volume-licenses)
    4. How to remove Office license files on a Mac | Microsoft Support
    5. Where to enter your Office product key | Microsoft Support
    AI-generated content may be incorrect. Read our transparency notes for more information.

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