How to use Due to/from subsidiary on saved search ? I have the impression that these fields are not available in a saved search or workbook. I tried with suitescript which manages to export them to a csv file but I would like to know if there is an easier way to reach them in reports or saved search

It's not exposed in saved searches or workbooks unless the Centralized Purchasing and Billing feature is enabled (which should not be enabled unless it's needed - adds complexity in inventory tracking).