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:
Admin impact, New feature, Updated message, User impact
Links:
Details:
Summary:
Microsoft Purview eDiscovery (Premium) introduces the Advanced Review Set Explorer with Kusto Query Language (KQL) for advanced data analysis alongside existing KeyQL. Public preview starts February 2026; general availability in late August 2026. The feature is enabled by default without affecting current workflows or permissions.
Details:
Updated February 27, 2026: We have updated the timeline. Thank you for your patience.
[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 late August 2026 (previously July) and expect to complete in late August 2026 (previously July).
Change Category:
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Scope:
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Release Phase:
General Availability, Preview
Created:
2026-01-23
updated:
2026-02-28
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's new Advanced Review Set Explorer for Purview eDiscovery (Premium) introduces the Kusto Query Language (KQL) for advanced data analysis, allowing users to perform complex searches and visualizations alongside the existing Keyword Query Language (KeyQL).
Direct effects for Operations**
User Experience Impact due to New Query Language
Users may experience confusion or frustration if they are not adequately trained on the new Kusto Query Language (KQL), leading to inefficiencies in data analysis and review processes.
- roles: eDiscovery Reviewers, IT Support Staff
- references: https://learn.microsoft.com/purview/edisc" target="_blank" rel="nofollow noopener noreferrer">https://learn.microsoft.com/purview/edisc, https://www.microsoft.com/microsoft-365/roadmap?filters=&searchterms=484086
Operational Disruption from Lack of Training
Without proper training and documentation, users may struggle to utilize the new Advanced Review Set Explorer effectively, potentially leading to delays in eDiscovery processes and increased support requests.
- roles: eDiscovery Teams, Compliance Officers
- references: https://learn.microsoft.com/kusto/query/?view=microsoft-fabric&toc=%2Fazure%2Fsentinel%2FTOC.json, https://learn.microsoft.com/purview/edisc" target="_blank" rel="nofollow noopener noreferrer">https://learn.microsoft.com/purview/edisc
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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change history
| Date | Property | old | new |
| 2026-02-28 | MC Messages | [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. | Updated February 27, 2026: We have updated the timeline. Thank you for your patience.
[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 late August 2026 (previously July) and expect to complete in late August 2026 (previously July). |
| 2026-02-28 | MC Title | Microsoft Purview | eDiscovery – Advanced review set explorer | (Updated) Microsoft Purview | eDiscovery – Advanced review set explorer |
| 2026-02-28 | MC Last Updated | 01/23/2026 01:55:53 | 2026-02-27T19:27:20Z |
| 2026-02-28 | MC MessageTagNames | New feature, User impact, Admin impact | Updated message, New feature, User impact, Admin impact |
| 2026-02-28 | MC 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. | Microsoft Purview eDiscovery (Premium) introduces the Advanced Review Set Explorer with Kusto Query Language (KQL) for advanced data analysis alongside existing KeyQL. Public preview starts February 2026; general availability in late August 2026. The feature is enabled by default without affecting current workflows or permissions. |
Last updated 2 weeks ago ago
