Mining Industry Practitioner Guide IRIS Lease Portal · SAP S/4HANA Integration · Month-End Close Checklist Part 1: IRIS → SAP S/4HANA Integration & Journal Posting Flow 1.1 Overview — How IRIS and SAP Interact IRIS is a dedicated lease accounting subledger. It holds the lease contract data, calculates the amortisation schedule, and generates the accounting entries that must be posted into SAP. The relationship is one-directional for journal generation: IRIS calculates, S