Hi Anil,
For finding any BAdi in SAP CRM, just follow the below steps:-
how to find badi in debug mode :
1. Open the class CL_EXITHANDLER in transaction se24.
2. In the class open the method GET_INSTANCE by double clicking on it.
3. In the method set a breakpoint in the statement CALL METHOD cl_exithandler=>get_class_name_by_interface
After doing the above steps execute the transaction for which you need to know the BAdIs. When the application stops at the breakpoint check the value in the CHANGING parameter EXIT_NAME in the debugger. This will contain the BAdI name.
The advantage with this way of searching for the BAdI is that you get to know at which point in time of the application the BAdI is called and how many times the BAdI is called. You can also find out BAdI at certain events, say, when you save or press enter in the transaction.
Thanks
Kumar