SAP HCI is built as Integration System-as-a-Provider (PAAS) which helps you to integrate multiple impartial units/apps for a business procedure. HCI can do Cloud to Cloud, Cloud to On-premise, On-premise to On-premise and Hybrid model. HCI features Adapters (Connectivity solutions) for instance: SOAP Adapter, IDoc, HTTP, Mail, SFTP,Ariba, oData. Ma