Shadow data

Concept

Shadow data is any unknown, hidden or overlooked copy of sensitive information that exists outside an organization's IT security and governance frameworks, for example in forgotten storage accounts, personal drives or AI training data sets.

Title graphic: Shadow data (Concept)

Type	Concept

Key points about Shadow data

Shadow data is a hidden risk: assuming what Purview cannot see does not exist creates a blind spot. · Shadow Data Discovery and Governance with…
Enterprises silently create a Shadow Data Lake of unlabeled, untraceable derivative insight. · Fix Copilot Notebooks GDPR and Governance Risks

Episodes about Shadow data

Shadow Data Discovery and Governance with Microsoft…

2026-06-07 · Video on YouTube

In this episode of the M365 FM Podcast, we explore one of the biggest hidden risks in modern data governance: shadow data. While Microsoft Purview provides powerful visibility into governed data sources, many organizations assume that what Purview cannot see…

Microsoft Purview as a Business Intelligence Layer

2026-03-23 · Video on YouTube

Most organizations believe they understand how their business operates. They point to org charts, policies, and compliance frameworks as proof. They are wrong. In this episode, Mirko Peters reframes Microsoft Purview from a compliance tool into...

Secure AI Agents and Shadow IT in Microsoft 365

2025-12-15 · Video on YouTube

Shadow IT didn’t disappear, it evolved into AI agents quietly moving your data faster than your controls can see. In this episode, we break down how AI agents, Copilot Studio bots, and Power Automate flows are becoming the new Shadow IT inside Microsoft 365.…

Fix Copilot Notebooks GDPR and Governance Risks

2025-11-03 · Video on YouTube

Copilot Notebooks feel magical — a conversational workspace that pulls context from SharePoint, OneDrive, Teams, decks, sheets, emails — and synthesizes answers instantly. But the moment users trust that illusion, they generate data that has no parents. Every…

Timeline of episodes about Shadow data

Articles about Shadow data (4)

Securing Sensitive Data: How to Protect Contracts and PII with Microsoft Purview Auto-Labeling
2026-08-28 · Mirko Peters
Welcome back to another deep dive into the evolving world of modern enterprise technology. In today's digital workplace, the velocity at which organizations create,…
Uncovering the Hidden Risks of Shadow AI in the Workplace
2026-08-26 · Mirko Peters
Welcome back, data security enthusiasts and modern workplace leaders! If you have been keeping an eye on how your teams utilize technology, you already know that th…
Uncovering the Hidden Risks of Shadow AI in the Enterprise
2026-08-26 · Mirko Peters
Welcome to our deep dive into one of the most pressing cybersecurity and compliance challenges facing modern organizations today: the rapid proliferation of shadow …
Microsoft Copilot Hallucination Risks
2026-04-16 · Mirko Peters
Understand Microsoft Copilot hallucination risks, why inaccurate answers happen, and how governance, grounding, validation, and user training reduce impact.

Frequently asked questions

What is shadow data?

Data outside formal governance, in unmanaged repositories, legacy systems, third-party apps, personal storage and forgotten workloads. · From the episode: Shadow Data Discovery and Governance with…

Why is shadow data a risk?

Shadow data is a risk because it threatens privacy, security and compliance by escaping oversight. It can sit in disconnected systems, unmanaged repositories, legacy platforms or personal storage that nobody governs. · From the episode: Shadow Data Discovery and Governance with…

Can Microsoft Purview see everything?

No. Microsoft Purview gives visibility into governed data sources, and assuming that what it cannot see does not exist creates a dangerous blind spot. Shadow data outside those sources stays unmanaged. · From the episode: Shadow Data Discovery and Governance with…

What is the Shadow Data Lake in Copilot?

It is the episode's term for the growing pool of unlabeled, untraceable derivative content that Copilot generates. Because the content is not governed like its sources, enterprises lose visibility into where sensitive information lives. · From the episode: Fix Copilot Notebooks GDPR and Governance Risks

Glossary

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Sources

Feed for this topic (RSS): entity/shadow-data/feed.xml
M365.FM episodes on this topic: 4
Articles on this topic: 4

Maintained by Mirko Peters (Microsoft MVP) · Last updated: 2026-11-03