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Introduction Finance and Operations provides two major ways to interact with tables (or data entities) for external system using APIs; namely Custom Services and Data Entities. Data entities in D365 Finance and Operations simplify data management by grouping data from multiple tables. They make it easier to import, export, and integrate data with other systems. Custom services in D365 Finance and Operations allow developers to create web services for specific business needs. They enable external systems to interact with D365 F&O by exposing custom logic and operations. This helps in integrating and automating processes with other applications. In the previous blog, we saw how we can use Data Entities to create APIs. In this blog, we'll see how we can use Custom Services to create APIs. References Custom Service Development Exposing an X++ Class as a Data Contract Using Data Contracts Pre-requisites A Finance and Operations Environment Postman connected to FnO Enviroment (If you

Introduction Finance and Operations provides two major ways to interact with tables (or data entities) for external system using APIs; namely Custom Services and Data Entities. Data entities in D365 Finance and Operations simplify data management by grouping data from multiple tables. They make it easier to import, export, and integrate data with other systems. Custom services in D365 Finance and Operations allow developers to create web services for specific business needs. They enable external systems to interact with D365 F&O by exposing custom logic and operations. This helps in integrating and automating processes with other applications. Feature Data Entities Custom Services Purpose  Simplify data management tasks like import, export, and integration.  Expose custom business logic and operations as web services. Functionality  Provide structured access to data from multiple tables in a u