Hi Angie,
Which table are you importing the Leads into? If you selected the Customer Leads table, this field is not included as it is not needed. When importing to this table, the IsLeadStatusOnly is not required, as all imports will be set to TRUE anyways. Here is a link to the Help Center article on the Import/Export tool: Import/Export Tool. When updating, make sure to include the recordID. This field uniquely identifies each record in the table. Including this allows Method to find the existing record in Method in order to update it.
- Adam