Data Migration & Legacy Modernisation

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Data Migration & Legacy Modernisation

Leave your old systems behind — without leaving your data behind.

Plan Your Migration

Moving from a legacy system to a modern Microsoft platform is one of the highest-risk moments in any technology project. Data quality issues, incomplete migration, mismatched formats and missed records can undermine an otherwise well-delivered implementation.

We've migrated data from Sage 50, Sage 200, Sage Line 500, Microsoft Dynamics GP, Dynamics NAV, Dynamics AX, bespoke Access databases, Excel estates and dozens of other legacy platforms.

e know where the problems hide — and how to prevent them.

Why This Matters

Bad data in a new system is worse than no system at all. It erodes confidence, creates reporting errors and makes AI and Copilot features unreliable. Getting the migration right is non-negotiable.

60% of ERP go-live failures are attributable to data quality issues
Legacy data typically contains 20–35% records requiring cleansing before migration
Unvalidated data undermines Copilot predictions, forecasts and AI-generated insights
✦ AI-FIRST Our AI-powered data profiling tools scan your legacy data before migration begins — automatically identifying duplicates, gaps, format inconsistencies and referential integrity issues so we can clean them before they cause problems.

What You Get

Legacy system data audit and quality assessment
Data mapping from source to target schema
AI-assisted data profiling, cleansing and deduplication
Automated migration scripts with full reconciliation reporting
Parallel run support and validation against legacy system
Post-migration support and anomaly resolution

Key Features

Migration from Sage 50, 200, 500, Sage Line, Sage X3
Migration from Dynamics GP, NAV, AX and older Dynamics versions
Migration from bespoke systems, Access databases and Excel
Dynamics 365 Business Central data migration
Dynamics 365 Customer Engagement / CRM data migration
Azure SQL and cloud data estate migration

What Success Looks Like

100% of critical business records migrated and reconciled
Clean, validated data in your new system from day one
AI and reporting features working accurately immediately post go-live
Full audit trail of what was migrated, transformed and why

Ideal If You're

Replacing Sage, NAV or GP
Moving from on-premise to cloud
Consolidating multiple systems
Preparing for Dynamics 365 Business Central

Book a Data Migration Assessment

Work Smarter. Grow Faster. Stay Ahead.

The technology you use should help you move faster, not hold you back. At Advantage, we help SMEs unlock the full power of Microsoft - from cloud and security to AI and automation. Whether you're modernising systems or exploring Copilot, we'll help you transform the way you work. Let's build something smarter. Together.