Change in Expected Delivery date (EDD) field in the PO after final release

Question

Hello Experts,
There is a business requirement, whereby after PO final release is completed & when the PO is released for further processing, no further changes should be possible, except for the expected delivery date (EDD) field in the Delivery schedule tab of the PO Item details. Other than this, no changes should be possible in the PO, neither qty, nor price, not even the simple PO text should be allowed to get changed. In other words no field should be allowed to change.
Ideally, except the EDD field, other all fields should be in grey mode, or atleast changes in any of the PO fields (except EDD) should not be allowed to get saved after the PO is final released.
Please let me know if SAP provides any such facility, whereby you can selectively choose certain fields (like EDD field) on which Release Strategy should not be applied & changes should be allowed in these fields even after PO final release.
Thanks in advance,
Zafar.

Answer 1

If you go to OMET transciton and here you can assign the field selection key in the field FieldSe
and assing the User parameter EFB in user id of the user using SU3 transction
for more help see below
Create a Functional Authorization in the Following path:
Material Mangement - Purchasing - Authorization Management - Define Functional Authorization for Buyers
Now, in SU3 trxn ,Give the User Parameter EFB in the user master Parameters Tab and give the parameter value.
create the fields selction which you want use here in PO field seleciton config.