Access needed to update PO data API as a SUPPLIER

Jul 28, 2026 7:44PM

Hi,

I am trying to to update the PO data using the following REST endpoint.
https://test.com/fscmRestApi/resources/11.13.18.05/draftPurchaseOrders/3724031

{
"ChangeOrderDescription":"Change Line level Quantity and Price",
"ChangeOrderInitiatingParty":"SUPPLIER", "lines": [ …
}
But getting the below error in postman.
"Error": You must provide a valid value for the ChangeOrderInitiatingParty attribute. The current value is SUPPLIER. (PO-2055145)

Same payload is working fine with "ChangeOrderInitiatingParty" : "Buyer".I need to make it work with "ChangeOrderInitiatingParty":"SUPPLIER".
I already provided the "PO_CHANGE_PURCHASE_ORDER_PRIV" to my custom role and added to the service account which I am using to invoke this api.
Does this service account needs to be a supplier? Please let me know the next steps.

Access needed to update PO data API as a SUPPLIER

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