Dynamics 365 CE modules went through a few stages of evolution. The first was when the core “Sales,” “Service,” and “Marketing” were separated out into their own Apps, and at around the same time, “Field Service” was also created as a new App. These were often referred to as “App modules” within Dynamics 365 CE. A single application could be visible to users without being distracted by possible nonrelevant ones. Customizations would be performed in the sitemap; areas would be hidden; and we would include workflows, new entities, and dashboards and create entirely new apps using ...