Creating and Using Custom Services in D365FO

 Custom services allow you to expose X++ business logic as web services that external systems can consume. These services are defined using X++ classes and methods, and they are published through service groups in D365FO. You can use custom services when: You need to perform complex business logic not possible through data entities.                Ex:Calculate Custom Discount and Tax Based on Business Rules You want to control how data is processed or returned. You are building a lightweight API for integration purposes. 🧱 Types of Services in D365FO Before diving into custom services, it’s good to know the types of services available in D365FO: Type Purpose OData Standard way to expose data entities for CRUD operations Custom Services X++ classes exposed as SOAP/REST endpoints DMF / Data Entities Used for data import/export (also accessible via OData) Business Events For pushing notifications to external systems In this blog, we focus on...