How our Calgary-based customer ensured procurement continuity and financial integrity through a reverse SAP migration.
Introduction
When two large enterprises merge, aligning backend systems becomes mission-critical, especially when core processes like procurement and finance rely on different ERP platforms. For our customer, the challenge was anything but typical: integrate Procure-to-Pay (P2P) data from an acquired company running SAP S/4HANA into its own legacy SAP ECC system. This reverse-direction migration—uncommon in SAP landscapes—required precise planning, deep technical expertise, and zero margin for error. That’s where Integritty came in.The Problem with Cross-Platform ERP Integration
While the acquiring company operated on SAP ECC, the acquired entity’s systems were built on S/4HANA, SAP’s next-generation platform. This created a structural mismatch between the data models, requiring a more complex export-import strategy. The key challenges included:- Reverse data migration from S/4HANA to ECC—rare and complex
- Material master, vendor, and contract data structures that didn’t align
- Migrating open POs, invoices, and inventory without disrupting operations
- Maintaining the integrity of financial obligations and inventory valuation
- Aligning stakeholders across procurement, finance, and IT
To mitigate risk, Integritty ran mock loads and full cutover rehearsals. Data validation, transformation logic, and stakeholder collaboration were embedded into every step of the process.
Implementation Highlights
- Custom ETL processes to adapt S/4HANA structures to ECC
- Translation logic to reconcile business partner and vendor master data
- End-to-end mapping of procurement and financial data objects
- Validation and mock runs to ensure clean cutover
- Joint execution with functional experts, developers, and tool partners
Results That Matter
The data migration was executed successfully, with no business disruption and complete operational alignment following the go live.
Business Continuity:
– Zero critical issues at go-live
– Uninterrupted procurement and finance operations
Process Accuracy:
– 100% mapping of critical P2P data across systems
– Clean handoff of open POs, invoices, and inventory
Future-Readiness:
– A reusable migration framework built for future M&A scenarios
– Standardized approach to SAP data harmonization
Conclusion
This rare reverse migration—from SAP S/4HANA to ECC—demonstrated that even complex integration scenarios can be executed flawlessly with the right partner. Integritty’s deep SAP expertise and collaborative approach ensured the client achieved a clean, controlled, and scalable transition, laying the groundwork for continued operational success.
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