To receive IDocs from and send IDocs to SAP, you need to define SAP Connector as an external logical system in SAP.
To define SAP Connector as an external logical system, create a single logical system in SAP for IDoc ALE integration with SAP Connector, and then create an RFC destination configured with a tRFC port in the SAP system to communicate with SAP Connector.
To identify the external logical system, you also need to create a partner profile for the logical system that you created.
When you define SAP Connector as a logical system, SAP acknowledges SAP Connector as an external system that can receive outbound IDocs from SAP and send inbound IDocs to SAP.
These instructions apply on the SAP version 4.6C. If you use a different version, the instructions may differ. For more information about how to create a logical system in SAP, see the SAP documentation.