502551 – Microsoft Purview compliance portal: Unique Counting of EDM Matches

Product:

Purview, Purview Communication Compliance, Purview compliance portal

Platform:

Web, World tenant

Status:

In development

Change type:

Links:

Details:

Providing a new mode to count EDM Matches where each row is counted once in addition to the current behavior where each primary element is counted once

Change Category:
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Scope:
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Release Phase:
General Availability, Preview

Created:
2025-09-25

updated:
2026-01-21

Public Preview Start Date

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Docu to Check

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MS workload name

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summary for non-techies**

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Direct effects for Operations**

Change in Data Counting Methodology
The introduction of a new counting mode for EDM Matches may lead to confusion among users regarding the accuracy of data reporting, potentially resulting in misinterpretation of compliance metrics.
   - roles: Compliance Officer, Data Analyst
   - references: https://techcommunity.microsoft.com/t5/security-compliance-identity-blog/microsoft-purview-compliance-portal-unique-counting-of-edm/ba-p/3741230

User Training and Adaptation
Users may require additional training to understand the new counting method, leading to temporary disruptions in workflow and productivity as they adapt to the changes.
   - roles: Compliance Officer, IT Support
   - references: https://techcommunity.microsoft.com/t5/security-compliance-identity-blog/microsoft-purview-compliance-portal-unique-counting-of-edm/ba-p/3741230

Configutation Options**

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Data Protection**

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IT Security**

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explanation for non-techies**

When dealing with compliance and data management, it's crucial to have accurate and efficient tools to track and manage sensitive information. Microsoft Purview compliance portal is one such tool that helps organizations maintain compliance by managing and protecting their data. One of the features of this portal is the ability to track and count Exact Data Match (EDM) matches.

Think of EDM matches like finding specific entries in a massive spreadsheet. Previously, the system would count each individual piece of sensitive information, like a social security number or credit card number, separately. This is similar to counting every single apple in a basket, even if some apples are part of the same batch or shipment.

The new update introduces a different counting method. Instead of counting each piece of information separately, it counts each row of data once. This is akin to counting each basket of apples as a single unit, regardless of how many apples are inside. This method can simplify the process and provide a clearer overview of how many unique data sets are being tracked, rather than focusing on every single piece of data.

This change can be particularly useful for organizations that need to report on data usage and compliance in a more streamlined manner. By focusing on unique data sets rather than individual data points, it can help in understanding the broader picture of data management and compliance. This new mode is being developed to offer more flexibility and accuracy in how organizations track and report their data compliance efforts.