Salesforce Sales Cloud - Only Mapped Fields are Returned in Transformations

When using transformations with Salesforce Sales Cloud, only the mapped fields are returned. Salesforce requires all fields that need to be returned to be included in the request. To avoid issues with accounts that have a large number of custom fields, the transformation functionality is designed to only request the mapped fields. If a field needs to be included, or custom javascript needs to be written for a certain field, be sure to include it within your mapped fields.