I am working on a bidirectional incident synchronization between two ServiceNow instances. The goal is to ensure that when an incident is created in Instance A, a corresponding incident is automatically created in Instance B with the same Incident Number and Sys ID. Additionally, updates to the incident in either instance should be reflected in the other instance, synchronizing at least 10 fields including Short Description, Description, Caller, Category, State, Impact, Urgency, Priority, Assignment Group, and Assigned To.
While I am aware of the approach using Flow Designer, I am considering using REST messages for a more robust integration. I would appreciate guidance on setting up REST messages for this synchronization, including best practices for error handling, data transformation, and security.
