Germany's e-invoicing rules are landing in phases: from 1 January 2025 every domestic B2B business must be able to receive a structured EN 16931 e-invoice, and from 2027-2028 sending becomes mandatory by company size. A PDF emailed to a customer is no longer a legal invoice between German businesses — you need structured XML.

This is a build-to-order extension for Microsoft Dynamics 365 Business Central, not an instant AppSource download. ECOSIRE builds it in AL as a per-tenant extension, installs it directly on your Business Central environment (cloud or on-prem), and supports it afterwards. We tailor it to your number series, posting setup, dimensions and document layouts rather than handing you a generic app to configure alone.

On the outbound side, the extension produces XRechnung (pure UBL/CII XML) and ZUGFeRD (PDF/A-3 with embedded XML) from posted sales invoices and credit memos, validates every document against the EN 16931 semantic model and the German CIUS before it leaves the system, and attaches the result to the posted record. For public-sector (B2G) invoices it captures and routes the Leitweg-ID.

On the inbound side, vendor e-invoices are parsed straight into purchase invoice documents — header, lines, tax and Leitweg data mapped to your G/L and vendor setup — so AP no longer rekeys XML by hand.

Delivery uses your existing channels by default, with an optional Peppol Access Point integration when you need network delivery. Everything runs through standard BC primitives: table/page extensions, event subscribers on posting routines, the Job Queue for batch export, dedicated permission sets, and the BC REST/OData API for downstream automation. You own the source; ECOSIRE maintains it as the standard evolves.