check before: 2026-02-01
Product:
eDiscovery, Purview, Purview Communication Compliance, Purview compliance portal
Platform:
Online, US Instances, Web, World tenant
Status:
In development
Change type:
New feature, User impact, Admin impact
Links:
Details:
Summary:
Microsoft Purview eDiscovery (Premium) introduces the Advanced Review Set Explorer (public preview in February 2026) enabling Kusto Query Language (KQL) for advanced data analysis alongside existing KeyQL. It offers complex filtering, visualization, and querying across 100+ metadata properties, with no impact on current workflows or permissions.
Details:
[Introduction]
We're introducing the Advanced Review Set Explorer (public preview) for review sets in Microsoft Purview eDiscovery (Premium).
eDiscovery has long supported Keyword Query Language (KeyQL) because it provides a familiar, approachable, and powerful way to search and filter content-while working consistently across both search and review experiences. For many users and workflows, KeyQL remains the recommended and most efficient way to build queries.
At the same time, we understand that power users and advanced reviewers often need greater flexibility to slice, aggregate, and analyze review set data in more sophisticated ways. To meet this need, we're adding a Kusto Query Language (KQL)-based experience to review sets through the Advanced Review Set Explorer.
With this update, reviewers will have two query options:
KeyQL, for familiar, streamlined search and filtering experiences
KQL, for advanced data exploration, aggregation, transformation, and visualization within a review set
The new Advanced review set explorer's key capabilities include:
Run advanced review set explorer using Kusto Query Language (KQL)
Apply complex filters, aggregations, and transformations
Visualize results with bar, column, and pie charts
Query across more than 100 metadata properties
Identify trends, detect patterns, and analyze data distribution
This message is associated with Microsoft 365 Roadmap ID 484086.
[When this will happen]
Public Preview (Worldwide, excluding government clouds): We will start rolling out in February 2026 and expect to complete in February 2026.
General Availability (Worldwide, GCC, GCCH, and DoD): We will start rolling out in July 2026 and expect to complete in July 2026.
Change Category:
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Scope:
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Release Phase:
General Availability, Preview
Created:
2026-01-23
updated:
2026-01-23
Public Preview Start Date
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Task Type
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Docu to Check
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MS How does it affect me
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MS Preperations
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MS Urgency
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MS workload name
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linked item details
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summary for non-techies**
Microsoft Purview eDiscovery has introduced the Advanced Review Set Explorer with Kusto Query Language (KQL), providing users with more sophisticated tools for deeper data analysis, pattern identification, and complex investigations, while still allowing the use of the traditional Keyword Query Language (KeyQL) for simpler searches.
Direct effects for Operations**
Introduction of Kusto Query Language (KQL)
Users may experience confusion or frustration if they are not adequately trained on the new KQL capabilities, leading to inefficient use of the new tool and potential delays in data analysis tasks.
- roles: eDiscovery Reviewers, IT Support Staff
- references: https://learn.microsoft.com/purview/edisc, https://www.microsoft.com/microsoft-365/roadmap?filters=&searchterms=484086
Default Enablement of Advanced Review Set Explorer
The automatic enablement of the new feature without prior user training may lead to misuse or underutilization of the tool, impacting the quality of data analysis and decision-making processes.
- roles: eDiscovery Reviewers, Compliance Officers
- references: https://learn.microsoft.com/purview/edisc, https://learn.microsoft.com/kusto/query/?view=microsoft-fabric&toc=%2Fazure%2Fsentinel%2FTOC.json
Configutation Options**
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Data Protection**
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explanation for non-techies**
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** AI generated content. This information must be reviewed before use.
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