HR –
Learn how to define the systems of record for all data components involved in SAP payroll processes, the designation of where they exist, and where they are maintained: SAP payroll on premise, SAP SuccessFactors Employee Central (which is in the cloud), and a similarly named SAP SuccessFactors Employee Central Payroll (which is in a hosted cloud.). See this guide by Stephane Routhier for making the right choice on defining which solution is the source for each data component.