Using classic Outlook for Windows in business environments
Gabriel Bratton, this is not buried earlier in thread, but adding it here again in case it helps:
Your registry key idea does not work except for a tiny percentage of people.
Your company, Microsoft, has been displaying immense disregard for us, your customers, who repeatedly have pleaded with them to just fix the problem in the first place. It's mind numbingly, stupefyingly tone deaf that no one from MS Management is getting this in their heads or has the integrity to show up in this forum and explain why they won't fix their own mistake that causes us inconvenience.