Hello experts, I want to set the field "Vendor"(LIFNR) as optional for movement type 221 when create reservation using T-code MB21. As far as I know, field selection of reservations is determined by the settings in the field selection(from201) of the movement type. But even when I have set the field "Vendor" as "optional" both in field selection (from 201) and field selection (Enjoy) for mvt 221 using T-code OMJJ, it is still not shown on the screen of creating reservation. Is it the SAP inside logic that restrict this field for movement type 221 or should I change any other settings elsewhere?
Any help will be highly appreciated.