The message flow of business entities from Commerce Cloud to Order Management Cloud happens via Oracle Integration Cloud Service.

Commerce Cloud has a Commerce adapter on Oracle Integration Cloud Service infrastructure which is used for the purpose of Integration. The Order Management Cloud part of the integration would use the generic SOAP adapter of the Integration Cloud Service to meet Integration purpose. The data from Commerce using the webhook framework goes via the Oracle Integration Cloud Service and reaches the Order Management Cloud. The data from the Order management reaches Commerce via the integration cloud service as well.

For more documentation on the capabilities of Oracle Integration Cloud Services, refer to the documentation on Oracle website.