The combination of automation tools that LenoxSoft should use to achieve their goal is an automation rule and a completion action. An automation rule is a rule that runs continuously in the background and matches prospects based on the criteria you set. A completion action is an action that Marketing Cloud Account Engagement executes after a prospect successfully completes a desired activity, such as submitting a form or clicking a custom link1. LenoxSoft can use an automation rule to update the custom field for anyone who has submitted the form before today, and a completion action to update the custom field for anyone who submits the form moving forward.