Currently we have a duplicate invoice check being performed which is picking up duplicate Accounts Payable invoices based on Supplier and Invoice Number. The issue is that suppliers can send invoices to a different organisation within our D365 F&O which bypasses the Duplicate check.For example;

1. Supplier 00001 sends invoice ABC123 to entity TEST1
2. TEST1 processes the invoice with no issues.
3. Supplier 00001 re-sends invoice ABC123 to entity TEST1
4. TEST1 deletes the invoice as it is flagged as a duplicate.
5. Supplier 00001 then re-sends invoice ABC123 to entity TEST2
6. TEST2 processes the invoice because it is not flagged as duplicate since it has only been processed in entity TEST1 and this is the first time it is being processed in TEST2 legal entity

Per responses here (2) Accounts Payable Duplicate invoice check across multiple organisations - Dynamics 365 Finance Forum Community Forum it appears that the only way is through customisation though I believe this should be a standard process.