Dear Roth,
Thanks for posting the thread on our forum and adding the related thread link for our reference here.
As you are using the Office applications installed from an Office 365 business subscription, the suggestions in the related thread may not work in your environment.
I do a test with the latest version of the Office 365 applications and it seems that I can't reproduce the issue in our environment. So please first check whether you are using the latest version of the Office 365 applications. If no, I suggest you update the version, restart the computer and then do a test to see the result. Meanwhile, upload a full screenshot of the Account page in the Excel application you are using for our clarification. You can access the page via clicking on File>Account.
Note: Remove any private information before uploading the screenshots.
Moreover, I suggest you log into the computer with the administrator account>go to Control Panel>Programs>right-click on the Office applications' icon>Change>check whether there is an Online Repair option. If yes, do an online repair, restart the computer and then do a test to see the result.
Best Regards,
Cliff