Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
This does not work if just adding a new worksheet to an existing workbook that had the new default setting when the workbook was created. What's the fix for that?
More broadly, why would Microsoft choose to change the default formatting for documents? The default should be up to the user, might be an idea next time to add a confirmation notification that asks the user if they are happy for the default to be changed (rather than it just being "automatic"), as you will have realised by now that not everyone wants to change the default. If the user clicks on "OK" then change it, if they don't then don't. Quite simple really. Think about your users Microsoft, not what you might believe is best!