Does anyone have experience with FormSite?  In order to update existing Salesforce Contact records, I understand that you need the Salesforce ID, that is, Contact.ID (a hidden field in the form), in the form url.  Check.  The problem is mapping.  If this field is unmapped, a new Salesforce record is created.  However, Contact.ID is not an option in the picklist of available fields to map to.  I know this is supposed to work.  What am I missing?

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