In SAP S/4HANA Cloud Public Edition, when building an integration scenario using the SAP Fiori Communication Management apps, it is essential to create both a 'Communication Arrangement' and a 'Communication System'. The Communication System represents the external system or the SAP system itself in the context of the integration. It is where you define the system's details, such as system ID and host information. The Communication Arrangement, on the other hand, specifies how the SAP S/4HANA system communicates with the defined Communication System, including the services to be used, authentication methods, and other specific settings required for the integration. These components are crucial for setting up secure and effective communication between SAP S/4HANA Cloud and other systems or applications.
References:
SAP S/4HANA Cloud documentation on Communication Management Setup
SAP Fiori apps reference library for Communication Management