If your MS 2021 for Mac is disabled after an update, see this guide
Some users are experiencing an activation issue with Office 2021 for Mac deactivated after update, when installing a recent Office update. Word, Excel, PowerPoint, and other Office apps may open existing documents but no longer allow users to edit or save them.
Instead, the apps display a message such as “Your Office 2021 license is not supported with this version of the application” or prompt users to activate Microsoft 365. The problem has been reported with Office version 16.114.1 (Build 26102031), released on October 22, 2026. Users with valid one-time-purchase licenses have reported that their purchases still appear in their Microsoft accounts, but the installed apps no longer recognize the licenses.
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Why Is Office 2021 for Mac Deactivated After Update?
Office 2021 for Mac reached the end of support on October 13, 2026. Microsoft has confirmed that it will no longer provide regular security updates or technical support after that date. This is discussed here. Reports indicate that the activation problem appeared after users updated to Office version 16.114.1. Signing out and signing back in, reinstalling the latest version, or refreshing the license did not resolve the issue for everyone. Earlier, Microsoft also deactivated MS office 2019 and 2016 for Mac due to an expired certificate which we covered here, but this time the problem is not related to it.
Available evidence suggests a possible compatibility or licensing issue with the affected build, but Microsoft has not officially confirmed it.
How to fix if MS 2021 Mac is disabled after update?
One workaround affected users to fix Office 2021 for Mac deactivated after Update issue is to uninstall the current Office apps and install an earlier version. The October 6, 2026 release, version 16.113.4 (Build 26100421), has restored activation for some users.
1. Remove the Existing Office License Files
Before reinstalling Office, remove the existing license files using Microsoft’s official instructions.
Follow the steps in Microsoft’s guide: Remove Office license files on a Mac.
This step may help if the existing licensing information is interfering with activation.
2. Uninstall Office Apps From Your Mac
Quit Word, Excel, PowerPoint, Outlook, and any other running Office apps.Open Finder and select Applications. Move the Office applications you need to reinstall to the Trash, following Microsoft’s official instructions.
For the complete procedure, refer to Microsoft’s guide to uninstalling Office for Mac.
3. Download an Earlier Office Version
Open Microsoft’s official Update history for Office for Mac page.
Locate the October 6, 2026 release:
- Version: 16.113.4
- Build: 26100421
Concurrently, Download the appropriate installer package and install Office. Also, direct download link for your convinience is here:
Download Office 2021 for Mac older version 16.114.1
Select the earlier version instead of reinstalling 16.114.1, which is associated with the reported issue.
4. Activate Office 2021 Again
After installation, open Word or Excel and sign in with the Microsoft account associated with your Office 2021 purchase. If the activation prompt remains, verify that the correct Office edition is installed and that the license is linked to the account you are using.
5. Temporarily Disable Automatic Updates
If the earlier version restores functionality, prevent Office from automatically installing the affected update again while you monitor Microsoft’s release notes for a resolution.
Open an Office app and select Help > Check for Updates. In Microsoft AutoUpdate, change the update setting to Manually Check if that option is available.
Remember that disabling automatic updates also prevents you from receiving future Office fixes and security updates. Recheck Microsoft’s release notes and resume updates when a suitable resolution is available.
What If Office 2021 Still Does Not Activate?
The rollback has worked for some users, but it is not a guaranteed solution for every Mac or Office installation. If the issue continues, open an Office app and select Help > Feedback > Report a Problem. Include your macOS version, Office edition, installed Office build, and the exact activation message.
You can also check Microsoft’s known issues and workarounds for Office for new information.
Conclusion
The Office 2021 for Mac deactivation issue has been reported after installing version 16.114.1. Affected users may be unable to edit or save documents even though their one-time-purchase license remains listed in their Microsoft account.
Reinstalling the October 6, 2026 build, version 16.113.4, has fixed MS 2021 Mac is disabled problem for most. However, this is a reported workaround rather than a confirmed universal fix. Back up important local data before uninstalling Office, and monitor Microsoft’s official guidance for further updates.