MSFT Office does not work

Question

ordered MSFT Office Home & Business 2021-DDP, been using it with no problems, recently it stopped working, reload it and updated my mac OS but nothing works

Answer 1

Hi Bud Smith,

It is understandable how disruptive this is, especially since Office Home & Business 2021 was previously working normally and reinstalling it did not resolve the problem.

Before removing Office again or installing an older build, please open any Office app and select Help > Check for Updates, then install all available updates. Some Office 2021 for Mac licensing problems were reported with earlier Office builds, so testing the latest available version is an important first step.

If Office still does not work, could you clarify what happens when you open Word or Excel? For example, does the app fail to launch, open in read-only mode, or display an activation message or error code? Please also check Word > About Microsoft Word and share the Office version shown there, but do not post your product key or Microsoft account address publicly.

If the message relates to activation, sign out of Office and sign back in with the Microsoft account originally associated with the Office Home & Business 2021 purchase. You can also follow Microsoft’s official activation troubleshooting guidance here:

What to try if you cannot install or activate Office for Mac

Thank you so much for your understanding. 

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Answer 2

Completely uninstall Office—including its Library files—then install Office 16.114 and reactivate it with the Microsoft account linked to your Office Home & Business 2021 purchase; running the installer over the existing installation does not perform this cleanup.^1^

1. Completely remove the current installation

Before proceeding, ensure that documents are saved. If Outlook contains locally stored POP/IMAP mail, back it up because deleting Outlook’s containers can remove local mailbox data.

1. Quit all Office applications.
2. Open Finder → Applications.
3. Select Word, Excel, PowerPoint, Outlook, and OneNote, then Control-click → Move to Bin.
4. In Finder, press Command+Shift+G, enter ~/Library, and select Go.
5. Open Containers and move the Microsoft Office containers listed in Microsoft’s uninstall instructions to the Bin.
6. Return to ~/Library, open Group Containers, and move these folders to the Bin if present:
   • UBF8T346G9.ms
   • UBF8T346G9.Office
   • UBF8T346G9.OfficeOsfWebHost
7. Restart the Mac.

The complete folder list and Outlook-data warning are in Microsoft’s uninstall procedure.^2^

2. Install the earlier Office build

Download and run the Microsoft-hosted Office 16.114 installer:

Microsoft Office 16.114 BusinessPro Installer

1. Open the downloaded .pkg from Finder → Downloads.
2. Complete the installation and enter the Mac administrator password when requested.
3. Open Word.
4. Sign in with the Microsoft account originally associated with the Office 2021 purchase.
5. Confirm that Word can create, edit, and save a test document.

This earlier-build workaround matches reports where Office 2021 for Mac suddenly entered view-only mode after an update.^1^

To prevent the problematic build from immediately reinstalling:

1. In Word or Excel, select Help → Check for Updates.
2. In Microsoft AutoUpdate, clear Automatically keep Microsoft apps up to date.
3. Select Turn Off.

This should be treated as a temporary workaround: disabling updates also prevents security fixes. Office 2021 support ended on October 13, 2026, although that does not cancel the perpetual license.^1^

If Office remains view-only

Try these in order:

1. In Word, select Word → About Microsoft Word → More Info → Refresh License.
2. Sign in with the account that owns Office Home & Business 2021.
3. If activation still fails, verify that Office 2021 appears under the Microsoft account’s services/licenses. Microsoft notes that an account associated with a valid one-time purchase is required to create or edit files.^3^
4. If the wrong or stale license remains attached, run Microsoft’s Office License Removal Tool, then reopen Word and reactivate with the purchasing account. The tool removes all Office licenses from the Mac, so have the correct account credentials available first.^4^

If activation still fails after the clean installation and license reset, record the exact activation message or error code and contact Microsoft Support through the activation help page.^5^

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References

1. Microsoft Word is disabled - Microsoft Q&A
2. Uninstall Office for Mac
3. What to try if you can't install or activate Office for Mac | Microsoft Support
4. How to remove Office license files on a Mac | Microsoft Support
5. Activate Office for Mac | Microsoft Support