Change the Oracle Listener for multiple Instance at once (4262580)

This task can be achieved from the Agent status Dashboard. 

1. Go to Administration | Agents | Agent Status
2. Select a sample Oracle Agent.
3. Under "Listener Name" field, create a new setting for listener or Clone the working ASP secondary configuration from a Oracle that has the required listener and give a custom name.
4. Return to Agent Status and do a multiple selection of all Oracle Agents with Edit Properties. 
5. Tick he "Listener Name" box and Select the cloned/created ASP Property with listener setting.
6. Hit Save.
7. Return to Agent Status screen and Deactivate / Activate the Oracle Agents to refresh the change.
8. Repeat steps for DB_Oracle and also for DB_Oracle_RAC_Instance if required.

For update listener on single Oracle instance refers to KB Configuring the List of Oracle Listeners per Instance