(Updated) Microsoft Defender for Cloud Apps: SIEM agents will retire

Message Center ID: MC1077861
Microsoft Defender XDR
Plan for Change
Major Change Admin impact Retirement
June 18, 2025
June 2025 November 2025 December 2025 January 2026

Summary

Microsoft Defender for Cloud Apps will retire SIEM agents between late December 2025 and early January 2026. No new SIEM agents can be configured after June 19, 2025. Users should transition to unified APIs and SIEM solutions for alerts and activity data to ensure continuity and enhanced capabilities.

Details

Updated December 1, 2025: We have updated the timeline. Thank you for your patience. 

As part of our ongoing convergence process for all Microsoft Defender workloads, we will retire SIEM (Security Information and Event Management) agents from Microsoft Defender for Cloud Apps in starting late December 2025 (previously mid-November) and ending early January 2026 (previously late November 2025). We recommend you transition to APIs that support the management of activities and alerts data from multiple workloads.

[How this will affect your organization:]

Existing Microsoft Defender for Cloud Apps SIEM agents will function as is until the SIEM agents retire, but no new SIEM agents can be configured starting June 19, 2025. Microsoft Sentinel agents will remain supported and can still be added.

Defender for Cloud Apps alerts and activities data currently supported in the SIEM agents are also available in the unified API and SIEM solutions that provide access to alerts and activity data for all Microsoft security products, for cross-workload visibility:

These APIs enhance security monitoring and management and offer additional supported capabilities that utilize data from multiple Microsoft Defender workloads.

[What you need to do to prepare:]

To ensure continuity and access to the same data available before this retirement through Microsoft Defender for Cloud Apps SIEM agents, we recommend transitioning to the supported unified API and SIEM solutions. We encourage you to begin planning your migration to these solutions to take advantage of their enhanced capabilities.

Learn more: Generic SIEM integration - Microsoft Defender for Cloud Apps | Microsoft Learn

Change History

December 2, 2025 at 6:31 PM Updated
Title
Previous
Microsoft Defender for Cloud Apps: SIEM agents will retire
New
(Updated) Microsoft Defender for Cloud Apps: SIEM agents will retire
Summary
Previous
Microsoft Defender for Cloud Apps will retire SIEM agents between mid-November 2025 and late November 2025. No new SIEM agents can be configured after June 19, 2025. Transition to APIs for managing activities and alerts data from multiple workloads is recommended. Microsoft Sentinel agents remain supported.
New
Microsoft Defender for Cloud Apps will retire SIEM agents between late December 2025 and early January 2026. No new SIEM agents can be configured after June 19, 2025. Users should transition to unified APIs and SIEM solutions for alerts and activity data to ensure continuity and enhanced capabilities.
Last Updated Date
Previous
2025-05-19T23:43:41.810Z
New
2025-12-02T17:23:07.610Z
Tags
Previous
Admin impact,Retirement
New
Updated message,Admin impact,Retirement
Body Content
Previous

As part of our ongoing convergence process for all Microsoft Defender workloads, we will retire SIEM (Security Information and Event Management) agents from Microsoft Defender for Cloud Apps in starting mid-November 2025 and ending late November 2025. We recommend you transition to APIs that support the management of activities and alerts data from multiple workloads.

[How this will affect your organization:]

Existing Microsoft Defender for Cloud Apps SIEM agents will function as is until the SIEM agents retire, but no new SIEM agents can be configured starting June 19, 2025. Microsoft Sentinel agents will remain supported and can still be added.

Defender for Cloud Apps alerts and activities data currently supported in the SIEM agents are also available in the unified API and SIEM solutions that provide access to alerts and activity data for all Microsoft security products, for cross-workload visibility:

These APIs enhance security monitoring and management and offer additional supported capabilities that utilize data from multiple Microsoft Defender workloads.

[What you need to do to prepare:]

To ensure continuity and access to the same data available before this retirement through Microsoft Defender for Cloud Apps SIEM agents, we recommend transitioning to the supported unified API and SIEM solutions. We encourage you to begin planning your migration to these solutions to take advantage of their enhanced capabilities.

Learn more: Generic SIEM integration - Microsoft Defender for Cloud Apps | Microsoft Learn

New

Updated December 1, 2025: We have updated the timeline. Thank you for your patience. 

As part of our ongoing convergence process for all Microsoft Defender workloads, we will retire SIEM (Security Information and Event Management) agents from Microsoft Defender for Cloud Apps in starting late December 2025 (previously mid-November) and ending early January 2026 (previously late November 2025). We recommend you transition to APIs that support the management of activities and alerts data from multiple workloads.

[How this will affect your organization:]

Existing Microsoft Defender for Cloud Apps SIEM agents will function as is until the SIEM agents retire, but no new SIEM agents can be configured starting June 19, 2025. Microsoft Sentinel agents will remain supported and can still be added.

Defender for Cloud Apps alerts and activities data currently supported in the SIEM agents are also available in the unified API and SIEM solutions that provide access to alerts and activity data for all Microsoft security products, for cross-workload visibility:

These APIs enhance security monitoring and management and offer additional supported capabilities that utilize data from multiple Microsoft Defender workloads.

[What you need to do to prepare:]

To ensure continuity and access to the same data available before this retirement through Microsoft Defender for Cloud Apps SIEM agents, we recommend transitioning to the supported unified API and SIEM solutions. We encourage you to begin planning your migration to these solutions to take advantage of their enhanced capabilities.

Learn more: Generic SIEM integration - Microsoft Defender for Cloud Apps | Microsoft Learn

Never Miss a Microsoft 365 Update

Join thousands of IT professionals who rely on DeltaPulse for real-time Microsoft 365 change intelligence, automated notifications, and community insights.