Data sources and the licensing model
We need to understand the unique differentiator that makes us need a license: whether a connector is labeled premium. This tag activates the end-user license requirement when using the app you created, even if you own a license to build it.
The current licensing model for end users is reminiscent of the SQL Server Client Access Licenses (CALs), in which every user accessing the server requires a pass. It is the same for the Power Platform. You add capacity to your environments to allow unlicensed users to access your app.
The platform recognizes which apps are built with premium connectors to access data or services. When you access the details of your apps or flows, you will see a License designation or Plan that will inform you about this:
Figure 4.1: License designation for a canvas app
These changes came on October 1, 2019, when many apps already used premium connectors, mainly Azure services, which were initially standard...