HI Punna,
This functionality is nothing but the Managers will raising various request in place of the sub-ordinates such as Leave Request,Travel request etc..
And the on behalf applications could be launched from Team view application or from the Employee profile application.
So to launch from the above mentioned applications there are various launchpads avilable in transaction code LPD_CUST which are ,
Role: MSS Instance:EMPLOYEE_MENU, Role: MSS Instance : RELATED_ACTIVITY.
Regards,
Mithun K