Troubleshooting the 'Your account doesn't allow editing on a Mac' Error

Users who work with Microsoft Office 365 on their Mac systems may encounter an unexpected error that states 'Your account doesn't allow editing on a Mac.' There are two main reasons for the appearance of this particular error. The first one is the result of Microsoft failing to recognize your Office 365 license, while the second cause could be corrupted files loathed in the Mac's Library folder. 

Checking the Office 365 License

Let's begin by trying to resolve any potential issues between Microsoft and your Office license. Open your Web browser of choice and go to the portal.office.com page. Click on 'My Account' and navigate to the 'Subscriptions panel.' Here, check if an entry for Office 365 is presented. If you have it, then Microsoft recognizes the license, and this is not the cause of the 'Your account doesn't allow editing on a Mac' error.

Removing Corrupted Files

Microsoft has identified three files in particular that can be responsible for the appearance of the 'Your account doesn't allow editing on a Mac' error. Before you can proceed to remove them, you must sign out of every Office application installed on your Mac. 

1. Open each application consecutively, click on its menu, and choose 'Sign Out.' 
2. Open Finder, select the 'Go' menu, and choose 'Go to Folder.' In the new window that opens, type or paste ~/Library and click on 'Go.' This should open the hidden ~/Library folder. 
3. Inside the ~/Library folder, click on the 'Group Containers' subfolder. 
4. Locate the following files and folders and move them to the Trash:

UBF8T346G9.ms

UBF8T346G9.Office

UBF8T346G9.OfficeOsfWebHost

5. All that is left is to empty the Trash, launch an Office application, and try to edit some documents to see if the 'Your account doesn't allow editing on a Mac' error has been resolved.