Week in brief

Sap Solution Security Content leads 703 Defender updates

Week of 20 April 2026 recorded 425 new, 270 updated, 8 removed Microsoft Defender documentation changes. The most active areas were Sentinel, Endpoint, Defender XDR.

For Defender administrators

Review the linked Microsoft Learn changes that apply to your managed platforms, policies, applications, and rollout plans. The archive preserves the source diff for verification.

This period briefing was assembled from the tracked Microsoft Learn and Message Center changes.

Updates this week

47

Ai Agent Detection Protection

Updated

Updated Microsoft Defender documentation in defender-xdr/security-for-ai/ai-agent-detection-protection.md.

26 April 2026

Ai Agent Detection Protection

Updated

Updated Microsoft Defender documentation in defender-xdr/security-for-ai/ai-agent-detection-protection.md.

26 April 2026

Ai Agent Detection Protection

Updated

Updated Microsoft Defender documentation in defender-xdr/security-for-ai/ai-agent-detection-protection.md.

26 April 2026

Ai Agent Detection Protection

Updated

Updated Microsoft Defender documentation in defender-xdr/security-for-ai/ai-agent-detection-protection.md.

26 April 2026

Defender Security For Ai

Updated

Updated Microsoft Defender documentation in defender-xdr/security-for-ai/defender-security-for-ai.md.

26 April 2026

Defender Security For Ai

Updated

Updated Microsoft Defender documentation in defender-xdr/security-for-ai/defender-security-for-ai.md.

26 April 2026

Defender Security For Ai

Updated

Updated Microsoft Defender documentation in defender-xdr/security-for-ai/defender-security-for-ai.md.

26 April 2026

Defender Security For Ai

Updated

Updated Microsoft Defender documentation in defender-xdr/security-for-ai/defender-security-for-ai.md.

26 April 2026

Ai Agent Detection Protection

Updated

Updated Microsoft Defender documentation in defender-xdr/security-for-ai/ai-agent-detection-protection.md.

26 April 2026

Ai Agent Detection Protection

Updated

Updated Microsoft Defender documentation in defender-xdr/security-for-ai/ai-agent-detection-protection.md.

26 April 2026

Ai Agent Detection Protection

Updated

Updated Microsoft Defender documentation in defender-xdr/security-for-ai/ai-agent-detection-protection.md.

26 April 2026

Ai Agent Detection Protection

Updated

Updated Microsoft Defender documentation in defender-xdr/security-for-ai/ai-agent-detection-protection.md.

26 April 2026

Ai Agent Detection Protection

Updated

Updated Microsoft Defender documentation in defender-xdr/security-for-ai/ai-agent-detection-protection.md.

26 April 2026

Ai Agent Detection Protection

Updated

Updated Microsoft Defender documentation in defender-xdr/security-for-ai/ai-agent-detection-protection.md.

26 April 2026

Ai Agent Detection Protection

Updated

Updated Microsoft Defender documentation in defender-xdr/security-for-ai/ai-agent-detection-protection.md.

26 April 2026

Ai Agent Detection Protection

Updated

Updated Microsoft Defender documentation in defender-xdr/security-for-ai/ai-agent-detection-protection.md.

26 April 2026

Autoad Results

Updated

Updated Microsoft Defender documentation in defender-xdr/autoad-results.md.

26 April 2026

Autoad Results

Updated

Updated Microsoft Defender documentation in defender-xdr/autoad-results.md.

26 April 2026

Phishing Triage Agent

Updated

Updated Microsoft Defender documentation in defender-xdr/phishing-triage-agent.md.

26 April 2026

Phishing Triage Agent

Updated

Updated Microsoft Defender documentation in defender-xdr/phishing-triage-agent.md.

26 April 2026

Whats New

Updated

Updated Microsoft Defender documentation in defender-xdr/whats-new.md.

26 April 2026

Autoad Results

Updated

Updated Microsoft Defender documentation in defender-xdr/autoad-results.md.

24 April 2026

Whats New

Updated

Updated Microsoft Defender documentation in defender-xdr/whats-new.md.

24 April 2026

Investigate Alerts

Updated

Updated Microsoft Defender documentation in defender-xdr/investigate-alerts.md.

23 April 2026

Microsoft 365 Defender

Updated

Updated Microsoft Defender documentation in defender-xdr/microsoft-365-defender.md.

23 April 2026

Investigate Alerts

Updated

Updated Microsoft Defender documentation in defender-xdr/investigate-alerts.md.

23 April 2026

Manage Rbac

Updated

Updated Microsoft Defender documentation in defender-xdr/manage-rbac.md.

23 April 2026

Manage Rbac

Updated

Updated Microsoft Defender documentation in defender-xdr/manage-rbac.md.

23 April 2026

Shield Predict Threats

Updated

Updated Microsoft Defender documentation in defender-xdr/shield-predict-threats.md.

22 April 2026
30

Security Alert Triage Agent

Updated

Updated Microsoft Defender documentation in defender-xdr/security-alert-triage-agent.md.

26 April 2026

Security Alert Triage Agent

Updated

Updated Microsoft Defender documentation in defender-xdr/security-alert-triage-agent.md.

26 April 2026

Security Alert Triage Agent

Updated

Updated Microsoft Defender documentation in defender-xdr/security-alert-triage-agent.md.

26 April 2026

Security Alert Triage Agent

Updated

Updated Microsoft Defender documentation in defender-xdr/security-alert-triage-agent.md.

26 April 2026

Security Alert Triage Agent

Updated

Updated Microsoft Defender documentation in defender-xdr/security-alert-triage-agent.md.

26 April 2026

Security Alert Triage Agent

Updated

Updated Microsoft Defender documentation in defender-xdr/security-alert-triage-agent.md.

26 April 2026

Security Alert Triage Agent

Updated

Updated Microsoft Defender documentation in defender-xdr/security-alert-triage-agent.md.

26 April 2026

Security Alert Triage Agent

Updated

Updated Microsoft Defender documentation in defender-xdr/security-alert-triage-agent.md.

25 April 2026

Security Alert Triage Agent

Updated

Updated Microsoft Defender documentation in defender-xdr/security-alert-triage-agent.md.

25 April 2026

Security Alert Triage Agent

Updated

Updated Microsoft Defender documentation in defender-xdr/security-alert-triage-agent.md.

25 April 2026

Security Alert Triage Agent

Updated

Updated Microsoft Defender documentation in defender-xdr/security-alert-triage-agent.md.

25 April 2026

Security Alert Triage Agent

Updated

Updated Microsoft Defender documentation in defender-xdr/security-alert-triage-agent.md.

25 April 2026

Security Alert Triage Agent

Updated

Updated Microsoft Defender documentation in defender-xdr/security-alert-triage-agent.md.

25 April 2026

Security Alert Triage Agent

Updated

Updated Microsoft Defender documentation in defender-xdr/security-alert-triage-agent.md.

25 April 2026

Security Alert Triage Agent

Updated

Updated Microsoft Defender documentation in defender-xdr/security-alert-triage-agent.md.

24 April 2026

Security Alert Triage Agent

Updated

Updated Microsoft Defender documentation in defender-xdr/security-alert-triage-agent.md.

24 April 2026

Security Alert Triage Agent

Updated

Updated Microsoft Defender documentation in defender-xdr/security-alert-triage-agent.md.

24 April 2026

Security Alert Triage Agent

Updated

Updated Microsoft Defender documentation in defender-xdr/security-alert-triage-agent.md.

24 April 2026

Security Alert Triage Agent

Updated

Updated Microsoft Defender documentation in defender-xdr/security-alert-triage-agent.md.

24 April 2026

Security Alert Triage Agent

Updated

Updated Microsoft Defender documentation in defender-xdr/security-alert-triage-agent.md.

24 April 2026

Security Alert Triage Agent

Updated

Updated Microsoft Defender documentation in defender-xdr/security-alert-triage-agent.md.

24 April 2026

Security Alert Triage Agent

Updated

Updated Microsoft Defender documentation in defender-xdr/security-alert-triage-agent.md.

24 April 2026

Security Alert Triage Agent

Updated

Updated Microsoft Defender documentation in defender-xdr/security-alert-triage-agent.md.

24 April 2026

Security Alert Triage Agent

Updated

Updated Microsoft Defender documentation in defender-xdr/security-alert-triage-agent.md.

24 April 2026

Security Alert Triage Agent

Updated

Updated Microsoft Defender documentation in defender-xdr/security-alert-triage-agent.md.

24 April 2026

Security Alert Triage Agent

Updated

Updated Microsoft Defender documentation in defender-xdr/security-alert-triage-agent.md.

24 April 2026

Security Alert Triage Agent

Updated

Updated Microsoft Defender documentation in defender-xdr/security-alert-triage-agent.md.

24 April 2026

Security Alert Triage Agent

Updated

Updated Microsoft Defender documentation in defender-xdr/security-alert-triage-agent.md.

24 April 2026

Security Alert Triage Agent

Updated

Updated Microsoft Defender documentation in defender-xdr/security-alert-triage-agent.md.

21 April 2026
1

Whats New

Updated

Updated Microsoft Defender documentation in defender-xdr/whats-new.md.

23 April 2026
1
1

Whats New

Updated

Updated Microsoft Defender documentation in defender-xdr/whats-new.md.

23 April 2026
73

Full functionality

Updated

Updated Microsoft Defender documentation in defender-endpoint/defender-deployment-tool-windows.md.

26 April 2026

Restricted functionality

Updated

Updated Microsoft Defender documentation in defender-endpoint/defender-deployment-tool-windows.md.

26 April 2026

Restricted functionality

Updated

Updated Microsoft Defender documentation in defender-endpoint/defender-deployment-tool-windows.md.

26 April 2026

Restricted functionality

Updated

Updated Microsoft Defender documentation in defender-endpoint/defender-deployment-tool-windows.md.

26 April 2026

Restricted functionality

Updated

Updated Microsoft Defender documentation in defender-endpoint/defender-deployment-tool-windows.md.

26 April 2026

Restricted functionality

Updated

Updated Microsoft Defender documentation in defender-endpoint/defender-deployment-tool-windows.md.

26 April 2026

Evaluate Exploit Protection

Updated

Updated Microsoft Defender documentation in defender-endpoint/evaluate-exploit-protection.md.

25 April 2026

Built In Protection

Updated

Updated Microsoft Defender documentation in defender-endpoint/built-in-protection.md.

25 April 2026

Client Analyzer

Updated

Updated Microsoft Defender documentation in defender-endpoint/overview-client-analyzer.md.

25 April 2026

Customize Controlled Folders

Updated

Updated Microsoft Defender documentation in defender-endpoint/customize-controlled-folders.md.

25 April 2026

Device Control Faq

Updated

Updated Microsoft Defender documentation in defender-endpoint/device-control-faq.md.

25 April 2026

Tamper Resiliency

Updated

Updated Microsoft Defender documentation in defender-endpoint/tamper-resiliency.md.

25 April 2026

Exclusions overview

Updated

Updated Microsoft Defender documentation in defender-endpoint/navigate-defender-endpoint-antivirus-exclusions.md.

24 April 2026

Test your ASR rules deployment

Updated

Updated Microsoft Defender documentation in defender-endpoint/attack-surface-reduction-rules-deployment-test.md.

24 April 2026

Managing Exclusions

Updated

Updated Microsoft Defender documentation in defender-endpoint/managing-exclusions.md.

24 April 2026

Customize Controlled Folders

Updated

Updated Microsoft Defender documentation in defender-endpoint/customize-controlled-folders.md.

24 April 2026

Mde P1 Setup Configuration

Updated

Updated Microsoft Defender documentation in defender-endpoint/mde-p1-setup-configuration.md.

24 April 2026

Switch To Mde Phase 2

Updated

Updated Microsoft Defender documentation in defender-endpoint/switch-to-mde-phase-2.md.

24 April 2026

Test ASR rules

Updated

Updated Microsoft Defender documentation in defender-endpoint/attack-surface-reduction-rules-deployment-test.md.

23 April 2026

Client Analyzer

Updated

Updated Microsoft Defender documentation in defender-endpoint/overview-client-analyzer.md.

22 April 2026

Microsoft Defender Endpoint

Updated

Updated Microsoft Defender documentation in defender-endpoint/microsoft-defender-endpoint.md.

22 April 2026

Linux Support Connectivity

Updated

Updated Microsoft Defender documentation in defender-endpoint/linux-support-connectivity.md.

21 April 2026

Linux Support Connectivity

Updated

Updated Microsoft Defender documentation in defender-endpoint/linux-support-connectivity.md.

21 April 2026

Evaluate Mdav Using Gp

Updated

Updated Microsoft Defender documentation in defender-endpoint/evaluate-mdav-using-gp.md.

21 April 2026

Run Analyzer Linux

Updated

Updated Microsoft Defender documentation in defender-endpoint/run-analyzer-linux.md.

20 April 2026

Review Detected Threats

Updated

Updated Microsoft Defender documentation in defender-endpoint/review-detected-threats.md.

20 April 2026
50

Migrating Asr Rules

Updated

Updated Microsoft Defender documentation in defender-endpoint/migrating-asr-rules.md.

25 April 2026

Whats New Mde Archive

Updated

Updated Microsoft Defender documentation in defender-endpoint/whats-new-mde-archive.md.

25 April 2026

Adv Tech Of Mdav

Updated

Updated Microsoft Defender documentation in defender-endpoint/adv-tech-of-mdav.md.

25 April 2026

Migrating Asr Rules

Updated

Updated Microsoft Defender documentation in defender-endpoint/migrating-asr-rules.md.

24 April 2026

ASR rules overview

Updated

Updated Microsoft Defender documentation in defender-endpoint/attack-surface-reduction-rules-overview.md.

24 April 2026

ASR rules reference

Updated

Updated Microsoft Defender documentation in defender-endpoint/attack-surface-reduction-rules-reference.md.

24 April 2026

ASR rules report

Updated

Updated Microsoft Defender documentation in defender-endpoint/attack-surface-reduction-rules-report.md.

24 April 2026

ASR rules deployment guide

Updated

Updated Microsoft Defender documentation in defender-endpoint/attack-surface-reduction-rules-deployment.md.

24 April 2026

Enable your ASR rules deployment

Updated

Updated Microsoft Defender documentation in defender-endpoint/attack-surface-reduction-rules-deployment-implement.md.

24 April 2026

Monitor ASR rules activity

Updated

Updated Microsoft Defender documentation in defender-endpoint/attack-surface-reduction-rules-monitor.md.

24 April 2026

ASR rules overview

Updated

Updated Microsoft Defender documentation in defender-endpoint/attack-surface-reduction-rules-overview.md.

22 April 2026
6

Defender Endpoint Plan 1

Updated

Updated Microsoft Defender documentation in defender-endpoint/defender-endpoint-plan-1.md.

25 April 2026

Plan your ASR rules deployment

Updated

Updated Microsoft Defender documentation in defender-endpoint/attack-surface-reduction-rules-deployment-plan.md.

24 April 2026
6

Troubleshoot ASR rules

Updated

Updated Microsoft Defender documentation in defender-endpoint/troubleshoot-asr.md.

25 April 2026

Troubleshoot Settings

Updated

Updated Microsoft Defender documentation in defender-endpoint/troubleshoot-settings.md.

25 April 2026

Troubleshoot Asr

Updated

Updated Microsoft Defender documentation in defender-endpoint/troubleshoot-asr.md.

23 April 2026

Troubleshoot Asr

Updated

Updated Microsoft Defender documentation in defender-endpoint/troubleshoot-asr.md.

22 April 2026

Troubleshoot Asr Rules

Removed

Removed Microsoft Defender documentation in defender-endpoint/troubleshoot-asr-rules.md.

22 April 2026
3

Respond Machine Alerts

Updated

Updated Microsoft Defender documentation in defender-endpoint/respond-machine-alerts.md.

26 April 2026

Threat Protection Reports

Updated

Updated Microsoft Defender documentation in defender-endpoint/threat-protection-reports.md.

24 April 2026

Tamper Resiliency

Updated

Updated Microsoft Defender documentation in defender-endpoint/tamper-resiliency.md.

23 April 2026
1
14

Submissions Teams

Updated

Updated Microsoft Defender documentation in defender-office-365/submissions-teams.md.

24 April 2026

Submissions Teams

Updated

Updated Microsoft Defender documentation in defender-office-365/submissions-teams.md.

23 April 2026

Mdo Support Teams About

Updated

Updated Microsoft Defender documentation in defender-office-365/mdo-support-teams-about.md.

23 April 2026

Scc Permissions

Updated

Updated Microsoft Defender documentation in defender-office-365/scc-permissions.md.

22 April 2026

Mdo Support Teams About

Updated

Updated Microsoft Defender documentation in defender-office-365/mdo-support-teams-about.md.

20 April 2026

Zero Hour Auto Purge

Updated

Updated Microsoft Defender documentation in defender-office-365/zero-hour-auto-purge.md.

20 April 2026
7

Migrate To Sensor V3

Updated

Updated Microsoft Defender documentation in defender-for-identity/deploy/migrate-to-sensor-v3.md.

26 April 2026

Whats New

Updated

Updated Microsoft Defender documentation in defender-for-identity/whats-new.md.

26 April 2026

Prerequisites Sensor Version 3

Updated

Updated Microsoft Defender documentation in defender-for-identity/deploy/prerequisites-sensor-version-3.md.

26 April 2026

Troubleshooting Known Issues

Updated

Updated Microsoft Defender documentation in defender-for-identity/troubleshooting-known-issues.md.

26 April 2026

Prerequisites Sensor Version 3

Updated

Updated Microsoft Defender documentation in defender-for-identity/deploy/prerequisites-sensor-version-3.md.

26 April 2026
8

Activity Filters

Updated

Updated Microsoft Defender documentation in defender-for-cloud-apps/activity-filters.md.

20 April 2026

General Setup

Updated

Updated Microsoft Defender documentation in defender-for-cloud-apps/general-setup.md.

20 April 2026

Manage Admins

Updated

Updated Microsoft Defender documentation in defender-for-cloud-apps/manage-admins.md.

20 April 2026

Cloud Discovery Aad Enrichment

Updated

Updated Microsoft Defender documentation in defender-for-cloud-apps/cloud-discovery-aad-enrichment.md.

20 April 2026

Cloud Discovery Anonymizer

Updated

Updated Microsoft Defender documentation in defender-for-cloud-apps/cloud-discovery-anonymizer.md.

20 April 2026

Scoped Deployment

Updated

Updated Microsoft Defender documentation in defender-for-cloud-apps/scoped-deployment.md.

20 April 2026
313

Whats New

Updated

Updated Microsoft Defender documentation in sentinel/whats-new.md.

26 April 2026

Whats New

Updated

Updated Microsoft Defender documentation in sentinel/whats-new.md.

26 April 2026

Entities Reference

Updated

Updated Microsoft Defender documentation in sentinel/entities-reference.md.

26 April 2026

Entities Reference

Updated

Updated Microsoft Defender documentation in sentinel/entities-reference.md.

26 April 2026

Entities Reference

Updated

Updated Microsoft Defender documentation in sentinel/entities-reference.md.

26 April 2026

Entities Reference

Updated

Updated Microsoft Defender documentation in sentinel/entities-reference.md.

26 April 2026

Whats New

Updated

Updated Microsoft Defender documentation in sentinel/whats-new.md.

26 April 2026

Create new watchlists

New

Added Microsoft Defender documentation in sentinel/watchlists-create.md.

20 April 2026

SOC optimization reference

New

Added Microsoft Defender documentation in sentinel/soc-optimization/soc-optimization-reference.md.

20 April 2026

Threat intelligence

New

Added Microsoft Defender documentation in sentinel/understand-threat-intelligence.md.

20 April 2026

Customer Managed Keys

Updated

Updated Microsoft Defender documentation in sentinel/customer-managed-keys.md.

20 April 2026

Index

Removed

Removed Microsoft Defender documentation in sentinel/index.md.

20 April 2026
61
15

Manage KQL jobs

New

Added Microsoft Defender documentation in sentinel/datalake/kql-manage-jobs.md.

20 April 2026
15
11
5
1
19

Page asset filters

New

Added Microsoft Defender documentation in easm/page-asset-filters.md.

23 April 2026

Host asset filters

New

Added Microsoft Defender documentation in easm/host-asset-filters.md.

23 April 2026

What Is Discovery?

New

Added Microsoft Defender documentation in easm/what-is-discovery.md.

23 April 2026

IP block asset filters

New

Added Microsoft Defender documentation in easm/ip-block-asset-filters.md.

23 April 2026

Domain asset filters

New

Added Microsoft Defender documentation in easm/domain-asset-filters.md.

23 April 2026

ASN asset filters

New

Added Microsoft Defender documentation in easm/asn-asset-filters.md.

23 April 2026

Contact asset filters

New

Added Microsoft Defender documentation in easm/contact-asset-filters.md.

23 April 2026
8

Modify inventory assets

New

Added Microsoft Defender documentation in easm/modifying-inventory-assets.md.

23 April 2026

Understanding Dashboards

Updated

Updated Microsoft Defender documentation in easm/understanding-dashboards.md.

23 April 2026

Index

Removed

Removed Microsoft Defender documentation in easm/index.md.

23 April 2026
1
4

Mdb Offboard Devices

Updated

Updated Microsoft Defender documentation in defender-business/mdb-offboard-devices.md.

25 April 2026

Mdb Offboard Devices

Updated

Updated Microsoft Defender documentation in defender-business/mdb-offboard-devices.md.

25 April 2026

Mdb Offboard Devices

Updated

Updated Microsoft Defender documentation in defender-business/mdb-offboard-devices.md.

25 April 2026

Mdb Manage Devices

Updated

Updated Microsoft Defender documentation in defender-business/mdb-manage-devices.md.

20 April 2026
1

Mdb Onboard Devices

Updated

Updated Microsoft Defender documentation in defender-business/mdb-onboard-devices.md.

25 April 2026
1