All Boston University suppliers are expected to join the Ariba Network to conduct all Procure-to-Pay transactions. Boston University will issue all Purchase Orders via the Ariba Network. Additionally, we will give preference to invoices submitted via the Ariba Network. Invoices sent via mail, email or fax could see significant delays in being processed for payment. For more information on how to conduct business on the Ariba Network with Boston University please visit the Supplier Information Portal.