Modernized finance operations with Business Central

the story

SIXT Denmark is a leading European car rental provider delivering high volume mobility services across Denmark, supporting complex finance and fleet operations. With Microsoft NAV reaching end of support, SIXT Denmark wanted to modernize its ERP landscape while preserving critical customizations, eliminating manual processes, and improving integration reliability, without disrupting ongoing operational workflows.

Nagarro migrated SIXT Denmark to cloud-based Microsoft Dynamics 365 Business Central, retained essential functionality, automated high volume financial processes using intelligent agents, modernized integrations, and enabled a scalable, future ready ERP platform.

Protecting business continuity

Existing NAV customizations were deeply embedded in critical workflows and had to be preserved or carefully modernized to avoid loss of business logic.

Reducing manual effort and errors

Manual processes created significant inefficiencies, particularly the manual uploading of e-invoices for customers that resulted in frequent errors, delays, and reconciliation issues.

Modernizing integrations

Third party integrations relied heavily on flat files and manual uploads, limiting real time data visibility and increasing operational risk.

Building for scale

They also wanted to reduce on-premises infrastructure maintenance costs while creating a scalable ERP foundation for future growth, new integrations, and automation.

Cloud ERP migration with business continuity

A structured migration approach ensured critical customizations across Finance, Sales, Purchasing, and Inventory were preserved while adopting standard Business Central capabilities. The approach focused on preserving critical customizations where needed, while adopting standard Business Central capabilities to simplify the ERP landscape.

Add-on reconfiguration and functional enhancement

Existing add ons were configured to strengthen core business functionality, including:

• Continia Document Capture for automated invoice processing and document digitization.

• Continia Payment Management for streamlined payment processing, reconciliation, and bank integrations.

E-invoicing and automation

Implemented Pagero Online for e-invoicing and compliant electronic document exchange, replacing manual invoice processing. Implemented Nagarro’s proprietary Interface Files Agent to automate raw flat files ingestion, validation, formatting, and processing from external systems, converting them into Business Central‑ready records with optional automated posting.

Historical data migration

Over 140 GB of historical data, including ledger entries and attachments, was successfully migrated with full data integrity.

Third-party systems integrations

Robust integrations were established with key business systems:

• XFleet for inventory (car) synchronization and handling leasing data, e-Collect for damage and fine management.

• CarAds for leased car invoicing, and

• Google Cloud Platform for data warehousing.

Adoption and post go-live support

End-user training and post-go-live support ensured smooth adoption, operational stability, and a strong foundation for long-term ERP success.

Improved business visibility

Users gained better access to operational and financial data, with enhanced reporting across Sales, Purchasing, and Finance modules.

Reduced infrastructure costs

By migrating to a cloud-based ERP, SIXT Denmark achieved cost optimization by reducing on-premise ERP infrastructure maintenance and enhanced scalability, enabling flexible future expansion.

Greater operational control

The new cloud-based ERP foundation improved process consistency, reduced dependency on legacy systems, and supported more efficient day-to-day operations.

Modernized integrations

Streamlined integrations improved financial accuracy and compliance, while modern APIs enabled seamless connectivity with existing and future third‑party systems.

Faster processing with AI automation

Interface Files Agent enabled faster processing, improved data consistency, and minimal manual effort of creating draft records, particularly for high-volume transactional scenarios.

Efficiency gains

The AI agent accelerated the time taken by financial processes linked to interface files from 6-8 hours to minutes, eliminating errors and unlocking significant efficiency gains.