how to use that to get a dynamic value from the dropdown list selected for example I am trying to fetch the application list from the custom object and when I select one of the application from the drop down I need to get the native identity of that person who logged in from the application that they selected.
let me know if anyone know any solution for this issue.
I tried using the ONCHANGE as a message key but nothing works.
you need to set the application field with postBack = true and dynamic = true on the second field.
With postBack, you can use a rule or a script to read the application field value into another field and with dynamic you can refill dynamically the values of field.