Converted Leads
Leads have a special state to indicate that they have been converted into an account, a contact, and an opportunity. Your client application can convert leads via the convertLead() call. Users can also convert leads in Salesforce. After a lead has been converted, it’s read-only. However, you can query converted lead records. Only users with the View and Edit Converted Leads permission can update converted lead records.
Leads have several fields that indicate their converted status. These special fields are set when converting the lead in the user interface.
ConvertedAccountId
ConvertedContactId
ConvertedDate
ConvertedOpportunityIdIsConverted
Status
Поля доступны в APEX, 100%, был опыт.
https://developer.salesforce.com/docs/at ... lead.htm