check before: 2025-12-15
Product:
Defender, Defender for Identity, Defender XDR
Platform:
Online, US Instances, World tenant
Status:
Change type:
Feature update, Admin impact
Links:
Details:
Summary:
Microsoft Defender for Identity classic alerts will transition to the XDR detection platform starting mid-December 2025, improving detection accuracy. Admins must update workflows, use new Detector IDs, and reconfigure alert exclusions with XDR Alert Tuning rules. The rollout completes by early January 2026.
Details:
[Introduction]
Microsoft Defender for Identity classic alerts will transition to the XDR detection platform in mid-December 2025. This change improves detection accuracy and performance and aligns with our efforts to enhance security across environments.
[When this will happen:]
General availability (Production, GCC, and DoD): Rollout will begin in mid-December 2025 and is expected to complete early January.
Change Category:
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Scope:
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Release Phase:
Created:
2025-11-18
updated:
2025-11-18
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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summary for non-techies**
The library is upgrading its security system to a smarter XDR detection platform, requiring administrators to update workflows, Detector IDs, and alert tuning rules by January 2026 to enhance threat detection and response.
Direct effects for Operations**
Workflow Disruption
Admins may face disruptions in their alert management workflows due to the transition to new Detector IDs, leading to potential delays in incident response.
- roles: Security Admin, IT Operations Manager
- references: https://techcommunity.microsoft.com/t5/security-compliance-identity/microsoft-defender-for-identity-alerts-transitioning-to-xdr/ba-p/3751230
Increased False Positives
Without proper reconfiguration of alert exclusions, there may be an increase in false positives, causing unnecessary alerts and potential alert fatigue among security teams.
- roles: Security Analyst, Incident Response Team
- references: https://techcommunity.microsoft.com/t5/security-compliance-identity/microsoft-defender-for-identity-alerts-transitioning-to-xdr/ba-p/3751230
User Experience Degradation
End users may experience delays in response to security incidents if alerts are not properly managed, leading to potential security vulnerabilities.
- roles: End User, Help Desk Support
- references: https://techcommunity.microsoft.com/t5/security-compliance-identity/microsoft-defender-for-identity-alerts-transitioning-to-xdr/ba-p/3751230
Configutation Options**
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Opportunities**
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Potentional Risks**
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IT Security**
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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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Last updated 2 weeks ago ago
