You should have received an email invitation from your vendor that introduced you to a new portal that will make it more convenient for you to view and pay invoices. If you didn’t receive an invitation, please contact your vendor and ask them to send you one.
It’s also possible that your vendor does not have your correct or preferred email on record. You should verify your email address with your vendor before they send you an invite. You should also let you vendor know whether you or someone else on your team is the default, or primary, contact for your company.