If multiple rules conflict or overlap in Outlook, you can prioritize them by arranging the order in which the rules are executed. In the "Rules and Alerts" window, you can use the "Up" and "Down" arrows to change the order of rules. Outlook will process the rules from top to bottom, so make sure to order them according to your desired sorting preferences. This allows you to resolve conflicts and ensure that emails are sorted correctly based on your chosen criteria.