How is e-invoicing implemented in SAP?

You should configure SAP's native output settings for invoices, often using tools like SAP Document Compliance, and most importantly, you should integrate SAP with a certified third-party compliance solution or middleware like Complyance. Their system takes the invoice data from SAP, ensures it meets all local regulatory rules (like the UAE's FTA requirements), converts it into the correct format, and submits it to the government portal. This end-to-end managed process is what ensures your SAP-generated invoices are fully compliant.