Microsoft Office Home & Business 2021 for Mac licence no longer working

Luke G 25 Reputation points
2026-10-25T17:38:21.89+00:00

I purchased a perpetual Microsoft Office Home & Business 2021 for Mac license, which is registered to my Microsoft account.

Since updating to Excel version 16.114.1 (build 26102031) on macOS Tahoe 26.3.1(a), Office no longer recognizes my license and displays the following error:

“License not found. Your Office 2021 license is not supported with this version of the application.”

Troubleshooting steps I have already tried:

Ran the official Microsoft Office License Removal Tool.

Installed older official Office packages for versions 16.113.4 and 16.114.

(Note: Despite trying the above, Excel still reverts to or shows version 16.114.1).

Please confirm whether this is a known compatibility or licensing issue, and provide a solution that allows me to use my existing perpetual Office 2021 license without being required to purchase a Microsoft 365 subscription.

Microsoft 365 and Office | Subscription, account, billing | For home | MacOS
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Answer accepted by question author
DaveM121 (2) 17,880 Reputation points Volunteer Moderator
2026-10-25T17:58:41.81+00:00

This error is being reported with the Office apps on a Mac at the moment, follow these steps, step 3 is important.

1

Use the steps provided on this link to remove the Office licence from your Mac:

https://support.microsoft.com/en-us/microsoft-365-activation-licensing/how-to-remove-office-license-files-on-a-mac

2

Uninstall the Office apps using the steps provided on this link:

https://support.microsoft.com/en-au/office/lifecycle/officeinstall/uninstall-office-for-mac

3

Then download and install the October 6th version of Office for Mac from this link.

https://res.public.onecdn.static.microsoft/mro1cdnstorage/C1297A47-86C4-4C1F-97FA-950631F94777/MacAutoupdate/Microsoft_365_and_Office_16.113.26100421_Installer.pkg

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  1. Edward_Rainsford 0 Reputation points
    2026-10-25T17:54:11.1833333+00:00

    I had a similar kind of issue with software licensing before, and I’d suggest checking a couple of things first. Sign in to your Microsoft account and check your Services & subscriptions page to confirm that Office Home & Business 2021 for Mac is still linked to your account.

    If the license is listed there, make sure you’re signed in to Excel with the same Microsoft account used to activate Office. Since you’ve already tried the license removal tool and older Office versions, I wouldn’t keep repeating those steps.

    The error message seems to point to a possible licensing or version compatibility issue. I’d contact Microsoft Support, explain which Excel build caused the problem, and ask them to confirm which Office version supports your existing Office 2021 license on macOS Tahoe. Hopefully, they can help restore activation without requiring you to purchase Microsoft 365.

    You can check your account here: https://account.microsoft.com/services

    Microsoft Support: https://support.microsoft.com/en-us/contactus

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  2. AI answer

    2026-10-25T17:39:22.6+00:00

    Uninstall Office completely, reinstall Office 16.114 (26101123), and disable Microsoft AutoUpdate before it can restore 16.114.1; this is the case-matched workaround for the Office 2021 activation failure introduced with build 16.114.1.

    Roll back without losing the perpetual licence

    Installing an older package over 16.114.1 is insufficient because existing newer application files can remain, and Microsoft AutoUpdate can reinstall 16.114.1. Since the License Removal Tool and in-place older installers have already failed, use this sequence:

    1. Close every Office application and Microsoft AutoUpdate.
    2. Remove the installed Office applications.
      • Open Finder → Applications.
      • Command-click Microsoft Excel, Word, PowerPoint, Outlook, and OneNote.
      • Control-click the selection and choose Move to Bin.
      • Restart the Mac.
      Administrator credentials might be required. Removing the applications does not delete ordinary documents stored elsewhere. Avoid deleting Outlook container folders unless they have been backed up; Microsoft warns that doing so can remove Outlook data.^1^
    3. Install Office 16.114 (26101123) using the Microsoft-hosted package recommended in the matching accepted resolution: Download Office 16.114 BusinessPro Installer Microsoft’s release history identifies 16.114 (26101123) as the October 14 build immediately preceding 16.114.1 (26102031). It also states that the release history applies to the one-time-purchase Office 2021 for Mac product.^2^
    4. Prevent the automatic return to 16.114.1 before normal use.
      • Open Excel or Word.
      • Select Help → Check for Updates.
      • In Microsoft AutoUpdate, clear Automatically keep Microsoft apps up to date.
      • Select Turn Off when prompted.
      This update-prevention step is essential and is part of the accepted workaround for the same Office 2021/16.114.1 failure.^3^
    5. Activate and verify.
      • Sign in using the Microsoft account to which Office Home & Business 2021 is registered.
      • In Excel, select Excel → About Microsoft Excel.
      • Confirm that the version is 16.114 (26101123) and the product is identified as Office 2021.
      • Create a test workbook, edit it, save it, close it, and reopen it.

    If the BusinessPro installer does not activate correctly, repeat the clean application removal and use the Microsoft-hosted 16.113.4 (26100421) suite installer listed in Microsoft’s update history instead; that older build is also included in matching accepted Q&A resolutions.^4^

    Compatibility status

    Multiple reports match this exact combination: perpetual Office 2021 for Mac, update 16.114.1 (26102031), and the message that the licence is unsupported. This supports an emerging activation/licensing regression in that build, but no official Microsoft article currently confirms 16.114.1 as a known bug or announces a permanent fix.^5^

    Office 2021 reached end of support on October 13, 2026, meaning it no longer receives security fixes or technical support. End of support does not convert the perpetual licence into a Microsoft 365 subscription requirement; Microsoft states that organizations can continue using the product, subject to the security and reliability risks of unsupported software.^6^

    Keep automatic updates disabled only as a temporary workaround. Manually review the Office for Mac release history for a build newer than 16.114.1 that explicitly corrects activation, then back up important data before testing it.

    References

    1. Uninstall Office for Mac | Microsoft Support
    2. Update history for Office for Mac - Office release notes | Microsoft Learn
    3. Office 2021, release of 16.114.1- License Removed - Microsoft Q&A
    4. Office 2021 not working, says my license isn't activated - Microsoft Q&A
    5. Office 2021 for Mac activation failure — purchased licence rejected
    6. October 2026 announcements
    AI-generated content may be incorrect. Read our transparency notes for more information.

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