Incoming invoices
This page only appears in the sidebar once Maventa and/or Apix e-invoicing is turned on for the active company - see Settings → Maventa / Settings → Apix. Nothing to configure here means nothing shows up here.
A single inbox for e-invoices received through either operator - no need to check two separate places just because a company has both enabled.
What's in it
Each incoming e-invoice shows its sender, amount, due date, and a preview of the invoice itself (structured e-invoice data rendered readably, not just a raw file). From here you can link it to a voucher - either creating a new one pre-filled from the invoice data, or attaching it to an existing one - the same idea as Documents' unattached-file workflow, just for invoices arriving electronically instead of as a scanned receipt.
Which operator
An incoming invoice's source (Maventa or Apix) is shown alongside it, but day to day the inbox is deliberately operator-agnostic - you work through it the same way regardless of which network delivered a given invoice.