3761721 - Duplicate Supplier Invoice via Ariba not blocked after prior S/4 HANA invoice posting — S/4HANA Cloud Public Edition

• An invoice was created and approved in s/4hana against a purchase order for a given quantity.
• The same invoice was then created in ariba for the same quantity and was also approved in s/4hana.
• Two invoices (same quantity each) exist against one purchase order and one goods receipt/material document.
• The system allowed two invoice postings despite duplicate reference number checks being enabled.
• Relevant message types referenced: M8462, M8108, M8805, M8804.

SAP S/4HANA Cloud Public Edition

1. Create a purchase order in S/4 HANA Cloud tenant with ME21N advance app or "Create Purchase Order" app. 
2. Post Goods Receipt in S/4 HANA Cloud tenant.
3. Create a supplier invoice in S/4 HANA Cloud tenant with MIRO or "Create Supplier Invoice" app.
4. Create the same supplier invoice in Ariba (CIM).

Duplicate invoice check message types for Logistics Invoice Verification and Accounting were not configured.

1. In SSCUI 102091 (Define Message Types for Area M8), set the following message types to Error:

• M8462 (duplicate logistical invoice found)
• M8108 (duplicate financial invoice/accounting document found)
• M8805 (logistical invoice)
• M8804 (financial invoice)

      2. Ensure the standard duplicate controls are active where applicable:

• Duplicate reference number check enabled.
• Double invoice verification enabled for the supplier.
• GR-based invoice verification enabled at the purchase order and supplier, if required by the process.

Re-test the end-to-end scenario: Post the first invoice in S/4HANA, then attempt to post the same invoice from Ariba, and confirm the system raises an error and blocks the duplicate.

Ariba, Ariba network, duplicate invoice, duplicate check, logistics invoice verification, LIV, M8462, M8108, M8805, M8804, SSCUI 102091, three-way match, gr-based iv, supplier invoice, purchase order, CIM , KBA , MM-FIO-IV-2CL , Fiori UI for Invoice Verification (Public Cloud) , Problem