Outgoing and incoming services must be created for Message Broker:
Use Transaction SE80 to maintain FSM Cloud Connector Web Service configuration. Choose the Package /PACG/ECM, then select the node "Enterprise Services" → "Service Definition" and finally choose the service /PACG/ECM_WS:
Once you press the button presented on the screenshot above, the transaction SOAMANAGER will be launched. Login with your SAP user when the browser is launched and click “Create service”.
Afterwards, make sure to check if webservice is active in transaction SICF and SMICM:
Next step: Outgoing Service (SAP to FSM)