A Microsoft file hosting and synchronization service.
Hi porma,
Thanks for getting back to us and sharing the detailed information. Now we understand the issue happens when you open the files from Word online to Word desktop application on Mac.
You may try following and see if the issue will disappear:
1.Quit Word app. In Finder on your Mac, go to the location ~/Library/Containers, find the "com.microsoft.Word" folder, move the folder to your Desktop.
(Do not delete it, you may put it back in case you need it later. This test is to check if the issue is Word cache related.)
2.Go to OneDrive online and find the document, open it in Word online first, click "Open in Word" to launch Word desktop application. If it prompts sign in, sign in your credentials and check the outcome.
If issue persists, try creating a test user account on your Mac, then log in Mac with the new account and check the outcome.
Disclaimer: Microsoft provides no assurances and/or warranties, implied or otherwise, and is not responsible for the information you receive from the third-party linked sites or any support related to technology.
If issue persists, please also let us know the detailed version of your Mac. (Apple menu>About This Mac)
Best Regards,
Tina