SuiteTalk (Web Services) Platform Guide - NetSuite

Web Services SecurityWorking with Custom Field Security83any existing integration that is in place using endpoints 2008_1 and older. Certain fieldpermissions such as NONE and VIEW might break the integration in an unintended way.Note: See “Restricting Access to Custom Fields” in the NetSuite Help Center for details on thisfeature.If the custom field security feature is turned on, Web services will respect the access level set oneach field. For example, if you have set a field permission to NONE, and you have code thatreferences the field, you will not be able to read or write to that field in your code. NetSuite Webservices will essentially ignore that field when the SOAP request is sent. Similarly, if a fieldpermission has been set to VIEW, you will be able to read the field’s value, but you will beunable to set the field’s value.Web services developers should keep custom field security in mind when designing theirintegrations. Before beginning a project, they should work with their company’s NetSuiteadministrator to review which fields may have custom security applied.SuiteTalk Platform Guide