MC1148528 – Microsoft Purview compliance portal: Data Loss Prevention: User based alert aggregation

Product:

Purview, Purview Communication Compliance, Purview compliance portal, Purview Data Loss Prevention

Platform:

Online, Web, World tenant

Status:

Rolling out

Change type:

Admin impact

Links:

501786

Details:

Summary:
Microsoft Purview DLP introduces opt-in User-Based Alert Aggregation, consolidating alerts by user within a set time window to improve security triage. Rolling out from September to November 2025, admins can enable it in the compliance portal to group rule match events per user, enhancing investigation efficiency.

Details:
[Introduction]
We're introducing User-Based Alert Aggregation in Microsoft Purview Data Loss Prevention (DLP) to help security teams triage alerts more efficiently. This feature consolidates DLP rule match events by user identity within a defined time window, enabling faster investigation and remediation of potential insider threats.
This message is associated with Roadmap ID 501786.
[When this will happen:]
Public Preview: We will begin rolling out late September 2025 and expect to complete by early October 2025.
General Availability (Worldwide): We will begin rolling out late October 2025 and expect to complete by early November 2025.

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

Created:
2025-09-06

updated:
2025-09-06

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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Pictures

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summary for non-techies**

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Direct effects for Operations**

Increased Alert Volume
The aggregation of alerts may lead to an increase in the total number of alerts generated, complicating the monitoring process for security teams.
   - roles: Security Admin, Compliance Officer
   - references: https://www.microsoft.com/microsoft-365/roadmap?filters=&searchterms=501786

Potential for Missed Alerts
With alerts being grouped, there is a risk that critical alerts may be overlooked if not properly monitored, leading to delayed responses to security incidents.
   - roles: Security Analyst, IT Operations Manager
   - references: https://www.microsoft.com/microsoft-365/roadmap?filters=&searchterms=501786

User Experience Impact
Users may experience confusion if they receive notifications about grouped alerts, leading to uncertainty about the severity of their actions.
   - roles: End User, Compliance Officer
   - references: https://www.microsoft.com/microsoft-365/roadmap?filters=&searchterms=501786

Training and Documentation Needs
The change may necessitate additional training and documentation for staff to understand the new alert aggregation process, impacting productivity during the transition.
   - roles: Training Coordinator, Security Admin
   - references: https://www.microsoft.com/microsoft-365/roadmap?filters=&searchterms=501786

Increased Investigation Time
While the feature aims to improve triage efficiency, the initial adjustment period may lead to longer investigation times as teams adapt to the new system.
   - roles: Security Analyst, IT Operations Manager
   - references: https://www.microsoft.com/microsoft-365/roadmap?filters=&searchterms=501786

Configutation Options**

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Opportunities**

Enhanced Security Incident Response
By consolidating alerts by user, security teams can quickly identify patterns of behavior, such as repeated violations of DLP policies, which can indicate potential insider threats or security risks. This leads to more proactive security measures and faster response times to incidents.
   - next-steps: Train security teams on how to leverage the User-Based Alert Aggregation feature for improved incident response. Develop internal protocols for analyzing aggregated alerts and correlating them with user behavior.
   - roles: Security Analysts, Compliance Officers, IT Administrators
   - references: https://www.microsoft.com/microsoft-365/roadmap?filters=&searchterms=501786

Improved Resource Allocation
With a clearer view of user-specific alerts, IT departments can allocate resources more effectively, focusing on users who pose a higher risk based on their alert history. This optimization can lead to better management of security personnel and reduced burnout.
   - next-steps: Analyze historical alert data to identify high-risk users and tailor training or monitoring efforts accordingly. Adjust team assignments based on the new insights from alert aggregation.
   - roles: IT Managers, Security Team Leads, Compliance Managers
   - references: https://www.microsoft.com/microsoft-365/roadmap?filters=&searchterms=501786

Streamlined Compliance Reporting
The aggregation of alerts per user allows for more straightforward compliance reporting, as it provides a clear view of user behavior regarding DLP policy violations. This can facilitate audits and compliance checks, making it easier to demonstrate adherence to regulations.
   - next-steps: Develop a reporting framework that utilizes aggregated alert data to generate compliance reports. Ensure that all relevant stakeholders are trained on how to access and interpret these reports.
   - roles: Compliance Officers, IT Auditors, Data Protection Officers
   - references: https://www.microsoft.com/microsoft-365/roadmap?filters=&searchterms=501786

Potentional Risks**

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Data Protection**

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IT Security**

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Hypothetical Work Council Statement**

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DPIA Draft**

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explanation for non-techies**

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