SAP HCI is made as Integration Platform-as-a-Support (PAAS) which helps you to integrate numerous independent systems/purposes for a company course of action. HCI can perform Cloud to Cloud, Cloud to On-premise, On-premise to On-premise and Hybrid model. HCI provides Adapters (Connectivity possibilities) which include: Cleaning soap Adapter, IDoc, HTTP, Mail, https://sap-s-4hana-cloud68135.blogrelation.com/34270130/hana-cloud-integration