Hi,
We have a requirement where the customer has Dynamics 365 on-premise implemented on Azure IaaS. The customer wants to build a custom portal on .Net Core / Angular and integrate it with Dynamics 365 on-premise. They have some outside users that need to interact with Dynamics for some CRUD (Create Update Delete) and Assign functionality with the Contact and Case records within Dynamics. These are around 1000 users that need to do these functions on public facing portals and cannot use Dynamics.
I need to know the licensing requirements for integrating a custom portal with Dynamics 365 CE on-premise. I believe we only need 1 full user license for the integration using SDK or Rest APIs and don't need any kind of Dynamics license for users outside our organisation for CRUD operations on 1 or 2 entities.