---
title: "Microsoft OneLake + Atlan: Governance Across Your Estate"
url: "https://atlan.com/partners/microsoft/data-governance-onelake-catalog/"
description: "Atlan, a Microsoft strategic partner, extends OneLake governance across your entire estate. Migration Studio brings your Purview Data Governance work with you."
keywords: "microsoft onelake atlan, onelake catalog governance, purview data governance migration, microsoft purview retirement, purview to atlan, migration studio"
---

# Microsoft OneLake + Atlan: governance across your entire estate.

Atlan's deep integration with OneLake, Fabric, and the rest of the Microsoft data and AI suite extends governance across your entire estate. And as Microsoft retires Purview Data Governance, with end of support on November 12, 2027, Atlan's Migration Studio continues the governance work your team built there.

What Microsoft says: "AI is only as trustworthy as the context behind it. Microsoft Fabric and OneLake provide a unified data foundation with governance in OneLake Catalog. Atlan's approach to metadata and governance helps customers extend trusted context beyond Fabric and across their entire data ecosystem." Dipti Borkar, Vice President, Microsoft IQ and OneLake.

## Partnering with Microsoft on the new data governance strategy

Microsoft named Atlan one of four spotlight partners for Microsoft Fabric at FabCon Europe 2026.

- **Everything connected, everything in one place:** a native Fabric connector brings lakehouses, warehouses, semantic models, and Power BI into Atlan, next to 120+ other sources, with column-level lineage across all of them.
- **Analytics on your governance:** query Atlan's context from Fabric Spark and Power BI to see which assets have no owner, no tags, or no description, through a OneLake shortcut in early access.
- **Context in the tools you already use:** the same certified context reaches your people in Teams and your agents in Copilot Studio.
- **Buy through Microsoft Marketplace:** private offers on Microsoft Marketplace. Eligible purchases count toward your Microsoft Azure Consumption Commitment (MACC).

Enterprise security: runs on Microsoft Azure with Microsoft Entra ID single sign-on. AICPA SOC, ISO/IEC 27001 and 27701, GDPR, and HIPAA.

## Trusted by AI-forward enterprises on Microsoft

General Motors, Medtronic, Cargill, Grainger, Autodesk, New York Life, NHS, PPG, Aliaxis, First Student, Nelnet, Andersen Corporation, Datavant, Graham Packaging, Endeavour Mining, and Scripps Health.

## How Microsoft OneLake and Atlan work together

Atlan extends governance around OneLake to every source you run, with lineage and business metadata across your estate. Your Purview Data Governance work moves to Atlan through a read-only extract. Atlan reads metadata and lineage from Fabric and your other sources, and makes its metadata available in OneLake through a shortcut. Microsoft Purview Data Security and Compliance keeps protecting your data.

## Start with OneLake catalog. Add Atlan for the rest of your data estate.

| What you need | OneLake catalog | OneLake catalog + Atlan |
|---|---|---|
| Find and trust data | Fabric items with lineage, ownership, and endorsements, also inside Teams and Excel | Plus every system outside Fabric, in one search |
| Sources | Data in OneLake, including shortcuts and mirroring of external sources | Plus Snowflake, Databricks, SAP, Oracle, Teradata, Tableau, and more, cataloged where they run, in the cloud and on premises |
| Lineage | Lineage across Fabric items | Column-level lineage from source systems through Fabric lakehouses, warehouses, Dataflows, and semantic models into Power BI reports |
| Your governance work | A full set of governance features: domains for federated governance, with glossary, endorsements, and discovery; OneLake Govern insights and actions for admins and data owners; and many more | Your glossaries, governance domains, data products, and custom metadata, migrated after your approval |
| AI and agents | Copilot and agents in Fabric | Plus Microsoft Copilot Studio and any MCP-capable agent, with governed definitions, owners, and lineage |
| Security and compliance | Microsoft Entra ID, OneLake security, network security, and Microsoft Purview Data Security | The same. Atlan works alongside all of them, with Entra ID single sign-on. |
| How you buy | Included with Fabric | Through Microsoft Marketplace. Eligible purchases count toward your MACC. |

## Your migration plan: Atlan's Migration Studio keeps your governance work alive

Purview's Data Map and Atlan both use the Apache Atlas type system, so your work carries across closely. You approve every step.

**Carries across**

- Glossaries, categories, and terms, with synonyms, acronyms, related terms, status, resources, and the assets they describe
- Governance domains and sub-domains, as Atlan domains and glossaries
- Data products, with their status, sensitivity, owners, assets, terms, and documentation links
- Custom attributes, definitions and values, typed to match
- Critical data elements as custom metadata, and objectives as glossary terms with their key results
- Classifications on your assets, your own and Microsoft's built-in ones, as Atlan tags
- Descriptions, display names, and owners, with owners matched by email and experts and stewards recorded alongside them
- Where everything came from: each migrated object records its Purview ID, URI, and collection

**You decide**

- Which glossaries, domains, products, and tags move
- Where each custom attribute lands in Atlan
- Which values win when a term, domain, or product with the same name already exists in Atlan
- Lineage you drew by hand, written where both ends are in Atlan

**Rebuilt by Atlan**

- Lineage crawled from your sources by Atlan's connectors, down to columns where the source exposes them
- Assets and technical metadata, kept current
- Sources Atlan doesn't crawl yet, created with their curation, which moves onto the crawled assets once Atlan connects the source
- Data quality rules, set up again in Atlan with your team

**Stays with Microsoft:** OneLake catalog and all its governance capabilities (discovery, curation, governance, security, and Microsoft Purview Data Security integrations), sensitivity labels, Data Loss Prevention, Data Security Posture Management, and Audit.

## How the migration works: migrate in 3 steps

1. **Analyze.** Grant two read-only roles. Atlan's Migration Studio extracts your estate and flags anything that would block the migration or drop data, plus every decision you need to make.
2. **Review.** Your governance lead decides where glossaries, domains, products, custom metadata, tags, and hand-drawn lineage land in Atlan. Nothing is written until you approve.
3. **Move.** Atlan's Migration Studio writes your governance into Atlan, validates it against the plan, then enriches your crawled assets. Rerun it for a fresh snapshot while both systems run.

What you can check at every step:

- Purview Data Governance stays untouched. Atlan reads with read-only access and writes nothing back.
- An analysis report: what carries across, what needs a decision, and anything that would drop data, before anything moves.
- A validation report: what you planned next to what landed in Atlan, with object counts, coverage for each glossary, tags, and custom metadata.
- Every object traced back to where it came from in Purview Data Governance.
- Run both side by side until you're ready. Each new run adds what's new without duplicating what already landed.

Start with an assessment: Atlan reads your Purview Data Governance with read-only access and gives you a plain-English report of what carries across and where your team will decide, plus a dated plan for your migration.

## A leader across every context category

Leader in the 2025 Gartner Magic Quadrant for Metadata Management Solutions, Leader in the 2026 Gartner Magic Quadrant for Data and Analytics Governance, and a Leader and Customer Favourite in the Forrester Wave. 95% of G2 users see Atlan as a true partner.

## Frequently asked questions

**What has Microsoft announced?**
Microsoft has announced a new data governance strategy, built on Microsoft OneLake. Governance moves into the data platform, and the OneLake catalog becomes the foundation for discovering, governing, and securing data in Microsoft Fabric. As part of that strategy, Purview Data Governance, including Microsoft Purview Unified Catalog, Data Map, and classic Azure Purview, reaches end of support on November 12, 2027. Microsoft Purview Data Security and Compliance is not affected.

**Does the OneLake catalog have sufficient governance capabilities?**
The OneLake catalog comes with Fabric and governs your Fabric items, so if your data lives almost entirely in Fabric, it may be all you need. Atlan is for teams whose data goes further: sources outside Fabric governed where they run, column-level lineage across all of them, the work you built in Purview Data Governance moved by Atlan's Migration Studio, and governed context for Copilot Studio and any MCP agent. Read how governance works in the OneLake catalog on Microsoft Learn.

**What additional sources does Atlan provide?**
Atlan connects to 120+ data sources across clouds and on premises, including Snowflake, Databricks, SAP, Oracle, Teradata, and Tableau.

**How does Atlan help with end-to-end lineage?**
Atlan traces lineage down to columns, including lineage mined from query logs, from your source systems through Fabric into Power BI reports, and across the rest of your estate.

**Do we need Microsoft Fabric to use Atlan?**
Atlan runs on Microsoft Azure and works whether or not you're on Fabric yet. Add the OneLake catalog as you adopt Fabric; a Fabric trial is a good place to start.

**What happens to our sensitivity labels and Data Loss Prevention policies?**
They stay with Microsoft Purview Data Security and Compliance. Classifications on your assets, both your own and Microsoft's built-in ones, carry across as Atlan tags.

**How long does a migration take?**
It depends on the size of your governance and how many sources you connect. Your assessment sizes the work and gives you a dated plan, with a completion date ahead of November 12, 2027.

**What does a migration cost?**
Buy Atlan on Microsoft Marketplace with a private offer. Eligible purchases count toward your Microsoft Azure Consumption Commitment, so you can fund the migration from a commitment you've already made. Your assessment includes a quote.

**Can we get our metadata out of Atlan later?**
Yes. Atlan's Context Lakehouse keeps your metadata in open Apache Iceberg tables that any Iceberg-compatible engine can query, including Microsoft Fabric through a OneLake shortcut. Atlan's APIs and SDKs give you programmatic access to all of it.

**Can Microsoft Copilot Studio agents use Atlan's governed metadata?**
Yes, through Atlan's MCP server. Other AI tools that support MCP can use it too.

## Bring your governance with you on Atlan and OneLake

Talk to us, or buy through Microsoft Marketplace.

## Next steps

- To see Atlan's context layer in action first, watch a recorded demo: [Atlan context layer demos](https://atlan.com/context-layer-demo/)
- To see Atlan working on your own data stack, book a demo: [Book a demo with Atlan](https://atlan.com/forms/talk-to-sales-contact/)