I have created two custom fields in billing document header level. 1. Customer GRN document no and Customer GRN date.This data is available with us after the Goods receipt at customer side. My question is  can we mass update these fields. if yes then...

How can we update the custom field added  using key user extensibility in s4 hana public cloud system. I have added customer GRN number in vf01 screen which i want to update using abap code after billing and accounting document is generated. How can ...