An electronic invoicing system performs a method of processing electronic invoices. A portal is provided by the system. The portal has respective views for a supplier submitting electronic invoices and an administrator of an enterprise submitting and/or reviewing electronic invoices. An administrator of the enterprise can create and maintain supplier groups in the portal, assign security permissions to the supplier groups in the portal; and assign users to the supplier groups in said portal. The users thereby receive security permission assigned to the supplier group to which they are assigned. The processing of electronic invoices by users is controlled in accordance with the assignments of security permissions to the supplier groups.