Updated Microsoft Defender documentation in defender-xdr/playbook-responding-ransomware-m365-defender.md.
Day in brief
Migrating Asr Rules leads 40 Defender updates
17 January 2026 recorded 3 new, 34 updated, 3 removed Microsoft Defender documentation changes. The most active areas were Endpoint, Defender XDR.
- Migrating Asr Rules
Endpoint · Endpoint protectionUpdated Microsoft Defender documentation in defender-endpoint/migrating-asr-rules.md.
- Enable attack surface reduction rules
Endpoint · Vulnerabilities and exposureAdded Microsoft Defender documentation in defender-endpoint/attack-surface-reduction-rules-enable.md.
- Understand attack surface reductionEndpoint · Vulnerabilities and exposure
Added Microsoft Defender documentation in defender-endpoint/attack-surface-reduction-overview.md.
- Use attack surface reduction rules to prevent malware infectionEndpoint · Vulnerabilities and exposure
Added Microsoft Defender documentation in defender-endpoint/attack-surface-reduction-rules-overview.md.
- Playbook Responding Ransomware M365 Defender
Defender XDR · Endpoint protectionUpdated Microsoft Defender documentation in defender-xdr/playbook-responding-ransomware-m365-defender.md.
This period briefing was assembled from the tracked Microsoft Learn and Message Center changes.
40 updates
Microsoft Defender XDR
1 updateMicrosoft Defender for Endpoint
39 updatesMigrating Asr Rules
UpdatedUpdated Microsoft Defender documentation in defender-endpoint/migrating-asr-rules.md.
Updated Microsoft Defender documentation in defender-endpoint/msda-updates-previous-versions-technical-upgrade-support.md.
Managing Exclusions
UpdatedUpdated Microsoft Defender documentation in defender-endpoint/managing-exclusions.md.
Client Analyzer
UpdatedUpdated Microsoft Defender documentation in defender-endpoint/overview-client-analyzer.md.
Client Behavioral Blocking
UpdatedUpdated Microsoft Defender documentation in defender-endpoint/client-behavioral-blocking.md.
Updated Microsoft Defender documentation in defender-endpoint/configure-exclusions-microsoft-defender-antivirus.md.
Updated Microsoft Defender documentation in defender-endpoint/configure-extension-file-exclusions-microsoft-defender-antivirus.md.
Customize Controlled Folders
UpdatedUpdated Microsoft Defender documentation in defender-endpoint/customize-controlled-folders.md.
Updated Microsoft Defender documentation in defender-endpoint/defender-endpoint-false-positives-negatives.md.
Edr In Block Mode
UpdatedUpdated Microsoft Defender documentation in defender-endpoint/edr-in-block-mode.md.
Updated Microsoft Defender documentation in defender-endpoint/enable-cloud-protection-microsoft-defender-antivirus.md.
Evaluate Exploit Protection
UpdatedUpdated Microsoft Defender documentation in defender-endpoint/evaluate-exploit-protection.md.
Feedback Loop Blocking
UpdatedUpdated Microsoft Defender documentation in defender-endpoint/feedback-loop-blocking.md.
Indicator Certificates
UpdatedUpdated Microsoft Defender documentation in defender-endpoint/indicator-certificates.md.
Mde P1 Setup Configuration
UpdatedUpdated Microsoft Defender documentation in defender-endpoint/mde-p1-setup-configuration.md.
Updated Microsoft Defender documentation in defender-endpoint/microsoft-defender-antivirus-compatibility.md.
Network Protection
UpdatedUpdated Microsoft Defender documentation in defender-endpoint/network-protection.md.
Onboarding Endpoint Manager
UpdatedUpdated Microsoft Defender documentation in defender-endpoint/onboarding-endpoint-manager.md.
Updated Microsoft Defender documentation in defender-endpoint/supported-capabilities-by-platform.md.
Switch To Mde Phase 2
UpdatedUpdated Microsoft Defender documentation in defender-endpoint/switch-to-mde-phase-2.md.
Tamper Resiliency
UpdatedUpdated Microsoft Defender documentation in defender-endpoint/tamper-resiliency.md.
Added Microsoft Defender documentation in defender-endpoint/attack-surface-reduction-rules-enable.md.
Added Microsoft Defender documentation in defender-endpoint/attack-surface-reduction-overview.md.
Added Microsoft Defender documentation in defender-endpoint/attack-surface-reduction-rules-overview.md.
Updated Microsoft Defender documentation in defender-endpoint/attack-surface-reduction-rules-deployment.md.
Updated Microsoft Defender documentation in defender-endpoint/attack-surface-reduction-rules-deployment-implement.md.
Updated Microsoft Defender documentation in defender-endpoint/attack-surface-reduction-rules-reference.md.
Updated Microsoft Defender documentation in defender-endpoint/behavioral-blocking-containment.md.
Whats New Mde Archive
UpdatedUpdated Microsoft Defender documentation in defender-endpoint/whats-new-mde-archive.md.
Updated Microsoft Defender documentation in defender-endpoint/attack-surface-reduction-rules-deployment-test.md.
Updated Microsoft Defender documentation in defender-endpoint/attack-surface-reduction-rules-report.md.
Updated Microsoft Defender documentation in defender-endpoint/navigate-defender-endpoint-antivirus-exclusions.md.
Attack Surface Reduction
RemovedRemoved Microsoft Defender documentation in defender-endpoint/attack-surface-reduction.md.
Attack Surface Reduction
RemovedRemoved Microsoft Defender documentation in defender-endpoint/overview-attack-surface-reduction.md.
Removed Microsoft Defender documentation in defender-endpoint/enable-attack-surface-reduction.md.
Troubleshoot Asr
UpdatedUpdated Microsoft Defender documentation in defender-endpoint/troubleshoot-asr.md.
Troubleshoot Asr Rules
UpdatedUpdated Microsoft Defender documentation in defender-endpoint/troubleshoot-asr-rules.md.
Defender Endpoint Plan 1
UpdatedUpdated Microsoft Defender documentation in defender-endpoint/defender-endpoint-plan-1.md.
Updated Microsoft Defender documentation in defender-endpoint/microsoft-defender-antivirus-using-powershell.md.