Using Classic Outlook on Windows for personal email, calendar, and contact management
You didn't answer his actual question. We want both want the new Outlook to use the Dark Theme, but we ALSO want the message area to NOT use Dark Theme. In the old Outlook, there was an option for "Never change the background color." This did exactly what we want. The new Outlook doesn't seem to have this option.
This is the issue, it's annoying to have to do this one by one for each message. We should be able to to toggle this for all messages.