Hello Sagar,
for these ISU Question, I think the area of CRM Service are not the right place.
I checked the documentation and I think the Link Products in IS-U/CRM Integration - IS-U/CRM Contract Integration - SAP Library give a more generaly information. Maybe the SAP note 2192973 gives additional infromation. But as already mentioned these Question are more related in the Area CRM-IU-IC .
Sorry that I can't give you more info's.
Best Regards
Gerhard