Using classic Outlook for Windows in business environments
I'm changing the quick actions settings to remove all quick actions. What this accomplishes is that quick action icons revert to the space at the end of from and before subject just as the description in settings shows. To set an action on an email which now has no quick actions just right click that email for the action context menu. To remove an action icon, same thing, just right click for the context menu of that email.
Also note that you can just use a right click by itself without altering quick actions settings. Display remains on the right though.