ISP-Invoice has an extensive and advanced interface with SAP. From the integration with SAP Archivelink you can request transactions from the digital invoice, including the audit trail in SAP.
If you change to a new version of SAP, ISProjects guarantees provision of new interfaces under a maintenance contract.
The benefits of an SAP integration with ISP-Invoice

Insight in the status of an invoice at any time due to the transparency of the process.

No lost invoices during the approval process.

The total cost per invoice can be reduced by up to 75%.

A digital invoice archive which allows managers and employees to easily look up invoices.
Technical features for the IT-manager
Master data: General ledger account, cost centres, internal orders, suppliers, currency codes.
F-63 : Putting invoices on hold
FB01 : Enter invoices in a suspense account
FB60 : Enter invoice in a ledger
FB02 : Release invoice for payment
FB08 : Reverse
Upload clearing date from SAP to ISP-invoice
Master data: Purchase orders and goods receipt
Mira : Invoice check in background
Miro : Transfer mismatch invoices / or enter invoices if Mira is not used
Mir6 : Download matching result to ISP-invoice / offer invoice for Mira again

What do Asito and Strukton say about the integration of SAP with ISP-Invoice?