With regards to the Change Auditor Server being renamed, please see recommended procedure below.
1. Uninstall Change Auditor Coordinator.
2. Rename the Change Auditor Coordinator server.
3. Wait for AD replication to complete.
4. Re-install Change Auditor Coordinator but with the same installation name and DB.
5. By doing this we create the SCP’s in AD again. The agents will be able to locate the Coordinator and reconnect.