I have shared the Enterprise WSDL to an external System to create contact. In Contact , I have two custom field Country and State. These field are lookup to object called Location.
In order to create Contact , external system has to put the Salesforce ID in Country and state lookup. But, external System does not have these SF id and they don't want to query as well. It's something needs to be handled from SFDC side.
Please advice how can I manage this.