Custom Detection Rules
UpdatedUpdated Microsoft Defender documentation in defender-xdr/custom-detection-rules.md.
Day in brief
Enable Attack Surface Reduction leads 11 Defender updates
13 March 2026 recorded 10 updated Microsoft Defender documentation changes and 1 relevant Message Center announcement. The most active areas were Endpoint, Office 365, Defender XDR.
- Enable Attack Surface Reduction
Endpoint · Vulnerabilities and exposureUpdated Microsoft Defender documentation in defender-endpoint/enable-attack-surface-reduction.md.
- Custom Detection Rules
Defender XDR · Hunting and detectionUpdated Microsoft Defender documentation in defender-xdr/custom-detection-rules.md.
- Attack Surface Reduction Rules Deployment TestEndpoint · Vulnerabilities and exposure
Updated Microsoft Defender documentation in defender-endpoint/attack-surface-reduction-rules-deployment-test.md.
- Detect And Remediate Illicit Consent Grants
Office 365 · Email and collaborationUpdated Microsoft Defender documentation in defender-office-365/detect-and-remediate-illicit-consent-grants.md.
- Microsoft Secure Score: New recommendations for Microsoft Defender for EndpointDefender XDR · Vulnerabilities and exposure
New Microsoft Secure Score recommendations for Microsoft Defender for Endpoint will roll out in public preview from late February to mid-March 2026. They include SMB server hardening and blocking file transfer over RDP. Recommendations are off by default and require admin action to enable.
This period briefing was assembled from the tracked Microsoft Learn and Message Center changes.
11 updates
Microsoft Defender XDR
2 updatesNew Microsoft Secure Score recommendations for Microsoft Defender for Endpoint will roll out in public preview from late February to mid-March 2026. They include SMB server hardening and blocking file transfer over RDP. Recommendations are off by default and require admin action to enable.
Microsoft Defender for Endpoint
5 updates
Managing Exclusions
UpdatedUpdated Microsoft Defender documentation in defender-endpoint/managing-exclusions.md.
Managing Exclusions
UpdatedUpdated Microsoft Defender documentation in defender-endpoint/managing-exclusions.md.
Managing Exclusions
UpdatedUpdated Microsoft Defender documentation in defender-endpoint/managing-exclusions.md.
Updated Microsoft Defender documentation in defender-endpoint/enable-attack-surface-reduction.md.
Updated Microsoft Defender documentation in defender-endpoint/attack-surface-reduction-rules-deployment-test.md.
Microsoft Defender for Office 365
4 updatesUpdated Microsoft Defender documentation in defender-office-365/detect-and-remediate-illicit-consent-grants.md.
Updated Microsoft Defender documentation in defender-office-365/defender-for-office-365-whats-new.md.
Updated Microsoft Defender documentation in defender-office-365/detect-and-remediate-outlook-rules-forms-attack.md.
Siem Server Integration
UpdatedUpdated Microsoft Defender documentation in defender-office-365/siem-server-integration.md.