Week in brief

Customer intent: As a threat hunter, security engineer or an security administrator, I want to manage jobs in the Microsoft Sentinel data lake so tha… leads 296 Defender updates

Week of 1 June 2026 recorded 4 new, 287 updated, 3 removed Microsoft Defender documentation changes and 2 relevant Message Center announcements. The most active areas were Defender XDR, Endpoint, Office 365.

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

60

UrlClickEvents

Updated

Updated Microsoft Defender documentation in defender-xdr/advanced-hunting-urlclickevents-table.md.

4 June 2026

Teams Restrictions Dexapp

Updated

Updated Microsoft Defender documentation in defender-xdr/teams-restrictions-dexapp.md.

4 June 2026

Ai Agent Inventory

Updated

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

3 June 2026

Ai Agent Inventory

Updated

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

3 June 2026

Defender Security For Ai

Updated

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

3 June 2026

Defender Security For Ai

Updated

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

3 June 2026

Defender Security For Ai

Updated

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

3 June 2026

Defender Security For Ai

Updated

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

3 June 2026

Defender Security For Ai

Updated

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

3 June 2026

Ai Agent Detection Protection

Updated

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

3 June 2026

Ai Agent Inventory

Updated

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

3 June 2026

Ai Agent Inventory

Updated

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

3 June 2026

Defender Security For Ai

Updated

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

3 June 2026

Ai Agent Inventory

Updated

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

3 June 2026

Ai Agent Inventory

Updated

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

3 June 2026

CloudProcessEvents (Preview)

Updated

Updated Microsoft Defender documentation in defender-xdr/advanced-hunting-cloudprocessevents-table.md.

3 June 2026

Teams Restrictions Dexapp

Updated

Updated Microsoft Defender documentation in defender-xdr/teams-restrictions-dexapp.md.

3 June 2026

Whats New

Updated

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

3 June 2026

Whats New

Updated

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

3 June 2026

Whats New

Updated

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

3 June 2026

Ai Agent Inventory

Updated

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

2 June 2026

Defender Security For Ai

Updated

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

2 June 2026

Ai Agent Detection Protection

Updated

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

2 June 2026

Ai Agent Detection Protection

Updated

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

1 June 2026

Ai Agent Detection Protection

Updated

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

1 June 2026

Defender Security For Ai

Updated

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

1 June 2026

Whats New

Updated

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

1 June 2026

CloudAuditEvents

Updated

Updated Microsoft Defender documentation in defender-xdr/advanced-hunting-cloudauditevents-table.md.

1 June 2026

CloudDnsEvents

Updated

Updated Microsoft Defender documentation in defender-xdr/advanced-hunting-clouddnsevents-table.md.

1 June 2026

CloudProcessEvents

Updated

Updated Microsoft Defender documentation in defender-xdr/advanced-hunting-cloudprocessevents-table.md.

1 June 2026

EmailPostDeliveryEvents

Updated

Updated Microsoft Defender documentation in defender-xdr/advanced-hunting-emailpostdeliveryevents-table.md.

1 June 2026

Manage Incidents

Updated

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

1 June 2026
17
6

Microsoft Defender XDR: Retirement of in-app OS update notifications in Defender for Endpoint (iOS)

New

Microsoft Defender for Endpoint on iOS will retire in-app OS update notifications by late July 2026, shifting OS update compliance and enforcement solely to Microsoft Intune and MDM/MAM. This removes duplicate messaging, requires no immediate action, and aims to simplify management and unify compliance across services.

5 June 2026
Message CenterMC1381122 on mc.merill.net ↗Major updatePlan for change

Ai Agent Inventory

Updated

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

3 June 2026

Ai Agent Inventory

Updated

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

3 June 2026

Ai Agent Inventory

Updated

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

3 June 2026

Ai Agent Inventory

Updated

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

1 June 2026
4
2

Whats New

Updated

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

3 June 2026

Whats New

Updated

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

3 June 2026
81

Mde Linux Prerequisites

Updated

Updated Microsoft Defender documentation in defender-endpoint/mde-linux-prerequisites.md.

4 June 2026

Machines View Overview

Updated

Updated Microsoft Defender documentation in defender-endpoint/machines-view-overview.md.

3 June 2026

Access Mssp Portal

Updated

Updated Microsoft Defender documentation in defender-endpoint/access-mssp-portal.md.

3 June 2026

Access Mssp Portal

Updated

Updated Microsoft Defender documentation in defender-endpoint/access-mssp-portal.md.

3 June 2026

Access Mssp Portal

Updated

Updated Microsoft Defender documentation in defender-endpoint/access-mssp-portal.md.

3 June 2026

Machines View Overview

Updated

Updated Microsoft Defender documentation in defender-endpoint/machines-view-overview.md.

3 June 2026

Update Agent Mma Windows

Updated

Updated Microsoft Defender documentation in defender-endpoint/update-agent-mma-windows.md.

2 June 2026

Discover Local Ai Agents

Updated

Updated Microsoft Defender documentation in defender-endpoint/discover-local-ai-agents.md.

2 June 2026

Gov

Updated

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

2 June 2026

Update Agent Mma Windows

Updated

Updated Microsoft Defender documentation in defender-endpoint/update-agent-mma-windows.md.

2 June 2026

Discover Local Ai Agents

Updated

Updated Microsoft Defender documentation in defender-endpoint/discover-local-ai-agents.md.

2 June 2026

Discover Local Ai Agents

Updated

Updated Microsoft Defender documentation in defender-endpoint/discover-local-ai-agents.md.

2 June 2026

Evaluate Mdav Using Gp

Updated

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

2 June 2026

Gov

Updated

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

2 June 2026

Next Generation Protection

Updated

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

2 June 2026

Protect Ai Agents Overview

Updated

Updated Microsoft Defender documentation in defender-endpoint/protect-ai-agents-overview.md.

2 June 2026

Switch To Mde Phase 3

Updated

Updated Microsoft Defender documentation in defender-endpoint/switch-to-mde-phase-3.md.

2 June 2026

Update Agent Mma Windows

Updated

Updated Microsoft Defender documentation in defender-endpoint/update-agent-mma-windows.md.

2 June 2026

Protect Ai Agents Overview

Removed

Removed Microsoft Defender documentation in defender-endpoint/protect-ai-agents-overview.md.

2 June 2026

Protect Ai Agents Overview

Updated

Updated Microsoft Defender documentation in defender-endpoint/protect-ai-agents-overview.md.

1 June 2026

Ios Configure Features

Updated

Updated Microsoft Defender documentation in defender-endpoint/ios-configure-features.md.

1 June 2026

Android Configure Mam

Updated

Updated Microsoft Defender documentation in defender-endpoint/android-configure-mam.md.

1 June 2026

Ios Configure Features

Updated

Updated Microsoft Defender documentation in defender-endpoint/ios-configure-features.md.

1 June 2026

Android Configure

Updated

Updated Microsoft Defender documentation in defender-endpoint/android-configure.md.

1 June 2026

Android Configure Mam

Updated

Updated Microsoft Defender documentation in defender-endpoint/android-configure-mam.md.

1 June 2026

Ios Configure Features

Updated

Updated Microsoft Defender documentation in defender-endpoint/ios-configure-features.md.

1 June 2026

Discover Local Ai Agents

Updated

Updated Microsoft Defender documentation in defender-endpoint/discover-local-ai-agents.md.

1 June 2026

Discover Local Ai Agents

Updated

Updated Microsoft Defender documentation in defender-endpoint/discover-local-ai-agents.md.

1 June 2026

Discover Local Ai Agents

Updated

Updated Microsoft Defender documentation in defender-endpoint/discover-local-ai-agents.md.

1 June 2026

Discover Local Ai Agents

Updated

Updated Microsoft Defender documentation in defender-endpoint/discover-local-ai-agents.md.

1 June 2026

Ios Configure Features

Updated

Updated Microsoft Defender documentation in defender-endpoint/ios-configure-features.md.

1 June 2026

Protect Ai Agents Overview

Updated

Updated Microsoft Defender documentation in defender-endpoint/protect-ai-agents-overview.md.

1 June 2026

Admin Submissions Mde

Updated

Updated Microsoft Defender documentation in defender-endpoint/admin-submissions-mde.md.

1 June 2026

Android Configure

Updated

Updated Microsoft Defender documentation in defender-endpoint/android-configure.md.

1 June 2026

Android Configure Mam

Updated

Updated Microsoft Defender documentation in defender-endpoint/android-configure-mam.md.

1 June 2026

Discover Local Ai Agents

Updated

Updated Microsoft Defender documentation in defender-endpoint/discover-local-ai-agents.md.

1 June 2026

Discover Local Ai Agents

Updated

Updated Microsoft Defender documentation in defender-endpoint/discover-local-ai-agents.md.

1 June 2026

Discover Local Ai Agents

Updated

Updated Microsoft Defender documentation in defender-endpoint/discover-local-ai-agents.md.

1 June 2026

Discover Local Ai Agents

Updated

Updated Microsoft Defender documentation in defender-endpoint/discover-local-ai-agents.md.

1 June 2026

Protect Ai Agents Overview

Updated

Updated Microsoft Defender documentation in defender-endpoint/protect-ai-agents-overview.md.

1 June 2026

Protect Ai Agents Overview

Updated

Updated Microsoft Defender documentation in defender-endpoint/protect-ai-agents-overview.md.

1 June 2026
2

Offboard Machine Api

Updated

Updated Microsoft Defender documentation in defender-endpoint/api/offboard-machine-api.md.

2 June 2026

Offboard Machine Api

Updated

Updated Microsoft Defender documentation in defender-endpoint/api/offboard-machine-api.md.

2 June 2026
1

Onboard Downlevel

Updated

Updated Microsoft Defender documentation in defender-endpoint/onboard-downlevel.md.

2 June 2026
1

Protect Ai Agents Overview

Updated

Updated Microsoft Defender documentation in defender-endpoint/protect-ai-agents-overview.md.

1 June 2026
75

Reports Email Security

Updated

Updated Microsoft Defender documentation in defender-office-365/reports-email-security.md.

1 June 2026

Preset Security Policies

Updated

Updated Microsoft Defender documentation in defender-office-365/preset-security-policies.md.

1 June 2026

Submissions Admin

Updated

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

1 June 2026

Mdo Email Entity Page

Updated

Updated Microsoft Defender documentation in defender-office-365/mdo-email-entity-page.md.

1 June 2026

Quarantine End User

Updated

Updated Microsoft Defender documentation in defender-office-365/quarantine-end-user.md.

1 June 2026

Quarantine Policies

Updated

Updated Microsoft Defender documentation in defender-office-365/quarantine-policies.md.

1 June 2026

Anti Spam Policies Configure

Updated

Updated Microsoft Defender documentation in defender-office-365/anti-spam-policies-configure.md.

1 June 2026

Mdo Portal Permissions

Updated

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

1 June 2026

User Tags About

Updated

Updated Microsoft Defender documentation in defender-office-365/user-tags-about.md.

1 June 2026

Campaigns

Updated

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

1 June 2026

Connectors Remove Blocked

Updated

Updated Microsoft Defender documentation in defender-office-365/connectors-remove-blocked.md.

1 June 2026

Threat Trackers

Updated

Updated Microsoft Defender documentation in defender-office-365/threat-trackers.md.

1 June 2026

Submissions Teams

Updated

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

1 June 2026

Air Examples

Updated

Updated Microsoft Defender documentation in defender-office-365/air-examples.md.

1 June 2026

Air Auto Remediation

Updated

Updated Microsoft Defender documentation in defender-office-365/air-auto-remediation.md.

1 June 2026

Anti Spam Spam Vs Bulk About

Updated

Updated Microsoft Defender documentation in defender-office-365/anti-spam-spam-vs-bulk-about.md.

1 June 2026

Teams Message Entity Panel

Updated

Updated Microsoft Defender documentation in defender-office-365/teams-message-entity-panel.md.

1 June 2026

Air About

Updated

Updated Microsoft Defender documentation in defender-office-365/air-about.md.

1 June 2026

Zero Hour Auto Purge

Updated

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

1 June 2026

Zero Hour Auto Purge

Updated

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

1 June 2026
2
3

Deploy Sensor V3

Updated

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

1 June 2026

Deploy Sensor V3

Updated

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

1 June 2026

Deploy Sensor V3

Updated

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

1 June 2026
3

Service Account Discovery

New

Added Microsoft Defender documentation in defender-for-identity/service-account-discovery.md.

3 June 2026

Service Account Discovery

Removed

Removed Microsoft Defender documentation in defender-for-identity/service-account-discovery.md.

3 June 2026
7

Protect Office 365

Updated

Updated Microsoft Defender documentation in defender-for-cloud-apps/protect-office-365.md.

1 June 2026

Ip Tags

Updated

Updated Microsoft Defender documentation in defender-for-cloud-apps/ip-tags.md.

1 June 2026

Ip Tags

Updated

Updated Microsoft Defender documentation in defender-for-cloud-apps/ip-tags.md.

1 June 2026

Protect Office 365

Updated

Updated Microsoft Defender documentation in defender-for-cloud-apps/protect-office-365.md.

1 June 2026

Protect Office 365

Updated

Updated Microsoft Defender documentation in defender-for-cloud-apps/protect-office-365.md.

1 June 2026
2
7

Kql Manage Jobs

Updated

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

3 June 2026

Kql Manage Jobs

Updated

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

3 June 2026

Kql Manage Jobs

Updated

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

1 June 2026

Kql Manage Jobs

Updated

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

1 June 2026
5

Whats New

Updated

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

3 June 2026
5

Risk Evaluation Changelog

Updated

Updated Microsoft Defender documentation in exposure-management/risk-evaluation-changelog.md.

4 June 2026

Risk Evaluation Changelog

Updated

Updated Microsoft Defender documentation in exposure-management/risk-evaluation-changelog.md.

4 June 2026

Risk Evaluation Changelog

Updated

Updated Microsoft Defender documentation in exposure-management/risk-evaluation-changelog.md.

4 June 2026

Risk Evaluation Changelog

Updated

Updated Microsoft Defender documentation in exposure-management/risk-evaluation-changelog.md.

4 June 2026

Risk Evaluation Changelog

Updated

Updated Microsoft Defender documentation in exposure-management/risk-evaluation-changelog.md.

4 June 2026
4

Tvm Security Recommendation

Updated

Updated Microsoft Defender documentation in defender-vulnerability-management/tvm-security-recommendation.md.

3 June 2026

Tvm Security Recommendation

Updated

Updated Microsoft Defender documentation in defender-vulnerability-management/tvm-security-recommendation.md.

3 June 2026

Tvm Exposure Score

Updated

Updated Microsoft Defender documentation in defender-vulnerability-management/tvm-exposure-score.md.

3 June 2026

Tvm Exposure Score

Updated

Updated Microsoft Defender documentation in defender-vulnerability-management/tvm-exposure-score.md.

3 June 2026
3

Fixed Reported Inaccuracies

Updated

Updated Microsoft Defender documentation in defender-vulnerability-management/fixed-reported-inaccuracies.md.

4 June 2026

Tvm Remediation

Updated

Updated Microsoft Defender documentation in defender-vulnerability-management/tvm-remediation.md.

3 June 2026

Tvm Remediation

Updated

Updated Microsoft Defender documentation in defender-vulnerability-management/tvm-remediation.md.

3 June 2026
4

Mdb Manage Devices

Updated

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

2 June 2026

Mdb Manage Devices

Updated

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

2 June 2026
1

Microsoft Sentinel Onboard

Updated

Updated Microsoft Defender documentation in unified-secops-platform/microsoft-sentinel-onboard.md.

1 June 2026
1