Available in: Salesforce Classic Available in: Group, Professional, Enterprise, Performance, Unlimited, and Developer Editions Make sure to It’s good to know that Map custom lead fields to other custom fields of the same data type. Specifically, map numeric lead fields to other numeric fields, or map long text area fields to other long text area fields. Some exceptions include: Map custom lead field types Number, Currency, or Percent to other number, currency, or percent fields of the same length and decimal places. For example, your lead currency field has a length of 3 and 2 decimal places. Map it to another custom currency field with a length of 3 and 2 decimal places. Not change data types for custom lead fields If you change data types for custom fields, Salesforce deletes the lead mappings for those custom fields.