If a customer is already on EC, S4HANA 2023 FPS01 with H4S4 activated(utilising full Time & Attendance module inc RPTIME00) but running payroll on ECP (Current Technology version), would it make sense to  put the payroll processing back into the exis...

Do you have to convert your PTP replications to BIB once ECP is converted to S/4HANA