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What Purview looks like in production. Guides, gotchas, and the things nobody warns you about.

Every article here is 5 minutes or less. Microsoft Learn has the full technical docs. We distil that down to what actually matters in practice - the business context, the common mistakes, and the things you need to know before you deploy.

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Why Microsoft Purview matters for your business

What Purview actually does, where it sits in the Microsoft security stack, and why it is a prerequisite for AI adoption. Written for the people who have to justify the project.

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20 articles

Guide16 Apr 2026· 5 min

Inline web DLP explained: the three enforcement paths

Purview now blocks text being sent to ChatGPT, files uploaded to Dropbox, or data downloaded from Workday to a personal laptop. Three enforcement paths, scattered across 10+ Microsoft articles. Here is what matters in practice.

Guide4 Apr 2026· 5 min

Adaptive Protection: the dynamic layer across DLP, Conditional Access, and Retention

Static DLP treats everyone the same. Adaptive Protection makes controls dynamic - tighter for risky users, invisible for everyone else. Here is how it connects IRM to DLP, Conditional Access, and Data Lifecycle Management.

Discussion23 Mar 2026· 5 min

Beyond E5: the extra Purview features worth knowing about

Microsoft Purview now has 15+ features that bill through Azure consumption, not your E5 licence. Most organisations have no idea they exist - or that some are already running. Here is what to watch and how to track the cost.

Discussion23 Feb 2026· 5 min

Secure by Default sounds great - here is why most orgs should not start there

Microsoft's new Secure by Default deployment model for Purview flips the traditional approach. Instead of starting open and adding restrictions, you start locked down and train users to request exceptions. The theory is solid. The problem is that most organisations are not greenfield tenants.

Guide18 Feb 2026· 5 min

Agent 365 - what Purview practitioners need to know

AI agents are already in your tenant. Agent 365 is Microsoft's governance layer to manage them across Entra, Defender, and Purview. Here is what it means for your security posture and the gaps to watch for.

Guide12 Feb 2026· 4 min

The 4 principles that decide what Purview actually keeps

You have multiple retention policies. Some say retain, some say delete, some overlap. When they conflict, Microsoft applies four rules in order. If you do not understand these rules, your retention strategy has gaps you cannot see.

Guide11 Feb 2026· 5 min

Use PIM to stop giving people permanent Purview admin access

Most Purview deployments hand out admin roles and never take them back. PIM gives you just-in-time access with approval, MFA, and time limits. Here is how to set it up for both Entra roles and Purview role groups.

Guide10 Feb 2026· 4 min

How to structure DLP policies so you can actually manage them

Most orgs create a handful of broad DLP policies and then struggle to manage the alerts. Split by workload and information category instead - it unlocks workload-specific conditions, cleaner alerts, and policies you can actually hand off to a team.

Guide10 Feb 2026· 5 min

One-click policies sound great - here is why you should not use them as-is

Microsoft Purview now offers one-click policies through DSPM that can secure your tenant in minutes. The catch is that several jump straight to block mode. In production, that breaks things. A crawl-walk-run approach gives you the same protection without the business disruption.

Guide10 Feb 2026· 5 min

Sensitivity label groups are replacing parent labels - what you need to do

Microsoft is replacing the parent-sublabel hierarchy with label groups. The migration is irreversible and rolling out now. Here is what changed, why it matters, and how to prepare.

Guide10 Feb 2026· 5 min

Trainable classifiers vs Sensitive Information Types - and why you should use both

SITs match patterns. Classifiers match content types. On their own they are useful. Together they dramatically reduce false positives and strengthen your auto-labelling, DLP, and retention policies.

Guide10 Feb 2026· 5 min

Use CloudAppEvents to actually see what your DLP policies are catching

The Purview DLP alerts page tells you something matched. CloudAppEvents in Defender XDR tells you everything - the policy, the rule, the SIT, the file, the user, and the action. Query it with KQL, export to CSV, and build Power BI dashboards that show what is really happening.

Gotcha10 Feb 2026· 4 min

Changing a DLP policy caused thousands of alerts on old data

A routine DLP policy change triggered SharePoint to re-scan every file in scope. Alerting lit up with thousands of matches on data that had been sitting there for years. Here is why it happens and how to avoid it.

Gotcha10 Feb 2026· 4 min

Audit log retention is not what you think

Standard audit retains logs for 180 days. If you need to investigate something that happened 7 months ago, the data is gone. Most organisations discover this during an investigation, not before. Here is what each licence tier actually gives you and how to avoid the gap.

Gotcha10 Feb 2026· 4 min

Microsoft lets you use Purview features you aren't licensed for

Unlike most software, Microsoft does not lock you out of unlicensed features. The buttons are there, the settings work, and policies deploy. But you are in breach of your licensing agreement. Here is why this matters and how to check.

Gotcha10 Feb 2026· 4 min

DLP in Teams works differently to every other workload

If you are expecting Teams DLP to work like Exchange DLP, you are in for a surprise. Messages are evaluated after sending, not before. There are no email notifications. And you need E5 just to cover chat messages. Here is what you need to know before turning it on.

Gotcha8 Feb 2026· 5 min

Auto-labelling doesn't classify all your data at rest

You deploy auto-labelling and assume everything is covered. It is not. Service-side classification only processes recently active files. Years of historical data sits untouched. Here's what actually happens and what to do about it.

Guide7 Feb 2026· 5 min

How I passed the SC-401

A personal account of passing the SC-401 Microsoft Information Security Administrator exam. What I used to prepare, what helped most, and what I would do differently.

Guide6 Feb 2026· 5 min

Copilot governance checklist

The security controls you need before enabling Microsoft 365 Copilot. SharePoint permissions, labels, DLP, and oversharing fixes.

Gotcha6 Feb 2026· 5 min

Copilot surfaces content from sites users forgot they had access to

Copilot respects permissions. That's the problem. Permissions in most tenants are a mess. Users ask Copilot a question and get results from HR sites, M&A folders, and salary spreadsheets they technically have access to but were never supposed to see.