How to setup an AP Inquiry role which allows updates to only the DFF fields

Summary

How to setup an AP Inquiry role which allows updates to only the DFF fields

Content

How to setup an AP Inquiry role which allows updates to only the DFF (additional information) fields in AP invoices screen and all the standard fields in the AP invoice are kept read only.

This is required as the non-AP users receive the additional information which is not available to the AP team when the invoice was initially sent and processed.