Enable Private SOAP Connections from OIC to Oracle SaaS

We have encountered a limitation when using the Oracle (HCM) Adapter in Oracle Integration Cloud (OIC) in private endpoint mode. Specifically, SOAP-based connections (e.g., for HDL import via WSDL) fail when using a private connection, while the same integration works fine when the connection is configured as public.

After raising a Service Request (SR), we were informed that SOAP calls in private mode are only supported when both systems (OIC and HCM/ERP) are deployed within the same VCN and subnet. However, Oracle SaaS applications like ERP and HCM run on the Oracle Cloud Network (OCN), and we as customers do not have control over placing these in our own VCN/subnet.