3719298 - Cannot split the authorization to post and reverse supplier invoices in SAP S/4HANA Cloud

It is not possible to only give user authorization to reverse supplier invoice while restrict the authorization to post invoice.

SAP S/4HANA Cloud Public Edition

1. Assign business catalog SAP_MM_BC_INV_PROCESS_MC or SAP_MM_BC_INV_PROCESS_PC to a user.
2. The user is able to both post and supplier supplier invoices.

The authorization for reversing and posting supplier invoices cannot be split. This is because when reversing a supplier invoice, the system automatically posts a credit memo which is also an invoicing document. 

It is not possible to sperate the posting of credit memo and posting of a supplier invoice based on roles assigned. Therefore if a user has the authorization to reverse the supplier invoice, (s)he will also be able to post the supplier invoice as well. 

This is standard system behavior.

SAP Note 2684816 - Posting logic for the reversal of an Invoice - SAP ERP & S/4HANA

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