3727168 - Authorization missing for service EmployeeMasterDataAndOrgAssignmentBundleReplicationRequest_In error during employee replication from EC to S/4HANA

When querying the master data and organizational assignment replication, from EC to your S/4HANA system - it fails with the following error in CPI: "Fault: Multicast processing failed for number 0. Exchange[XXX]. Caused by: [org.apache.cxf.binding.soap.SoapFault - Authorization missing for service 'http://sap.com/xi/PASEIN EmployeeMasterDataAndOrgAssignmentBundleReplicationRequest_In', operation 'EmployeeMasterDataAndOrgAssignmentBundleReplicationRequest';

• SAP SuccessFactors Employee Central integration with SAP Human Capital Management for SAP S/4HANA
• Employee Master Data Replication
• ECS4HCM Support Package

401 unauthorized, ECS4HCM, S/4HANA, EmployeeMasterDataAndOrgAssignmentBundleReplicationRequest_In, EmployeeMasterDataAndOrgAssignmentPushNotification_In, Authorization missing for service, employee replication failure, master data replication, organizational assignment replication, SAP_HR_ECPAO_WEBSERVICES, system user, communication user, EC to ERP integration, S4 system, employee central integration. , KBA , LOD-EC-INT-EE , Employee Integration EC to ERP On Premise , Problem