What is SAP RFC?
SAP is a common ERP platform. It is very large and complex and has very many uses to an enterprise business. An RFC stands for Remote Function Call and is the primary way that SAP communicates with external systems. RFCs can also be created between two SAP systems.
Enabling an RFC connection with a system allows that system to access data within the ERP, both pulling information as designated or updating SAP database tables. There are many uses for RFCs and their configuration largely depends on the data the external systems need access.