How to check reason for the invoice rejection?

Business Network

When the buyer rejects a Service Entry Sheet, he can provide a comment. The supplier can now view the rejection reasons specified by buyers on the Details tab of invoices and SESs. Suppliers need not navigate to the History tab of the documents to find the these rejection reasons.

SAP Business Network for Procurement & Supply Chain > Transaction Documents > Transaction (Invoicing)
Transaction Documents > Transaction Document Administration > Transaction Document Administration Invoices