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Migration Specialists

Legacy Data Mart Migration to Microsoft Fabric

Modernize aging data marts and departmental warehouses on Microsoft Fabric. ETL rebuilds in Data Factory, storage moves to Lakehouse and OneLake, and Power BI serves governed reporting on top.

Departmental marts built a decade ago now cost more to keep alive than to replace: aging SQL boxes, SSIS packages nobody dares touch, and nightly loads that finish later every year.

Migration Outcomes

1 LakeOneLake replacing scattered marts
Nightly to near-real-timeRefresh modernized
LineageEnd-to-end traceability in Fabric
0Aging mart servers left to patch
Why Organizations Leave legacy data marts

The cost of staying on legacy data marts

Aging infrastructure
Out-of-support SQL versions on hardware past its refresh date.
Fragile ETL
SSIS packages and stored procedure chains that fail on schema drift.
Shrinking load windows
Nightly loads creeping toward morning as volumes grow.
Mart sprawl
Finance, ops, and sales each with their own mart and their own numbers.
No lineage
Nobody can say with confidence where a figure came from.
Blocking analytics
Modern AI and self-service ambitions stuck behind legacy plumbing.
Migration Mapping

Everything in legacy data marts has a modern equivalent

Every component of your legacy data marts estate maps to Power BI and Microsoft Fabric. Nothing is left behind, and everything is validated against the original.

legacy data marts
Power BI and Microsoft Fabric
SQL Server data marts
Fabric Lakehouse and Data Warehouse
SSIS packages and proc chains
Data Factory pipelines and dataflows
Star schemas
Lakehouse dimensional models and semantic models
Nightly batch loads
Scheduled and incremental pipeline refresh
Mart-per-department copies
OneLake with domain workspaces
Report connections
Direct Lake semantic models for Power BI
How We Migrate

A proven 5-stage framework

The same structured methodology behind 1,200+ migrated reports. Validated side by side, documented, and delivered with zero disruption.

1

Assess

Inventory every report, data source, and dependency. Usage analysis identifies what actually matters.

2

Rationalize

Retire duplicates and unused reports. Typically 30 to 50 percent never need migrating.

3

Modernize

Rebuild on Power BI and Fabric with governed semantic models and validated outputs.

4

Govern

Workspaces, row-level security, certified datasets, and documented standards.

5

Enable

Training and handover so your team owns the platform, not a vendor.

Not sure where to start?

The free migration assessment inventories your legacy data marts estate, sizes the effort, and gives you a phased roadmap with costs. No commitment required.

Book a Free Migration Assessment →
Common Questions

legacy data marts migration FAQ

Lakehouse or Warehouse in Fabric?

Both are Fabric stores on OneLake. We typically land data in Lakehouse for flexibility and serve dimensional models through Warehouse or Direct Lake semantic models, decided per workload in the assessment.

What happens to our SSIS packages?

Packages are inventoried and rebuilt as Data Factory pipelines and dataflows. Where wholesale rebuild is premature, SSIS can run interim via the Azure integration runtime while conversion proceeds in waves.

How do you avoid breaking downstream reports?

Consumers are cataloged first. Marts run in parallel with Fabric during migration, outputs reconcile row by row, and each report cuts over only after validation.

Does this consolidate our conflicting marts?

Yes. Conformed dimensions and governed measures in shared semantic models replace department-by-department copies, which is where the conflicting-numbers problem actually gets fixed.

How long does a mart migration take?

A single mart with its ETL typically modernizes in 3 to 6 months. Multi-mart estates run as a program with a shared foundation wave first.

Other Migrations

We migrate every major legacy platform

Get Started

Book your free migration assessment

Tell us about your legacy data marts estate. A senior migration specialist will respond within one business day.

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