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Map Custom Fields for Lead and Opportunity Products and Preferred Sellers
Create custom fields on Lead Line Item and Lead Preferred Seller objects to suit your business requirements. Create similar custom fields on Opportunity Product and Opportunity Preferred Seller objects. Then, use the ObjectRelationshipHierarachy Metadata API to map the custom fields between the source and target objects. If the lead is converted to an opportunity, these custom field values are automatically populated when the Lead Line Item and Preferred Seller records convert to Opportunity Line Item and Preferred Seller records.

