Daily Defender NewsThe most consequential update is new Defender for Cloud guidance around AKS policy conflicts: Deny assignments can prevent Security Gating provisioning with RequestDisallowedByPolicy even on compliant clusters, and troubleshooting guidance now explains how to locate the conflict. Endpoint release notes identify Azure Linux 4 support and TCP socket bind telemetry, while Sentinel residency guidance specifies where processed and configuration data are handled. Defender for Cloud’s sensor changelog also records October GA images that remove trust in affected certificate authorities.
Defender for Cloud · Cloud and workloadsThe enablement guide now states that `Deny` policies targeting AKS managed clusters can prevent Security Gating provisioning with `RequestDisallowedByPolicy`, even when the clusters are compliant. It adds steps to identify the blocking assignment in the Activity Log and use `Audit` or a narrowly scoped exemption.
Defender for Cloud · TroubleshootingThe troubleshooting page now covers missing admission-controller resources and failed AKS writes with `RequestDisallowedByPolicy`, identifies policies that may conflict, and describes resolution through narrowly scoped changes or Microsoft Support.
Endpoint · Endpoint protectionThe October 2026 Linux release notes list version 101.26091.0004, Azure Linux 4 support, and TCP socket bind telemetry. After gradual rollout, the telemetry will be available in Advanced Hunting through the `DeviceNetworkEvents` table.
Sentinel · Cloud and workloadsThe page now states that Sentinel processes and stores processed and configuration data in the onboarding destination regions or applicable existing Defender XDR regions. It also expands the processed-data examples and removes the 21Vianet retirement notice.
Defender for Cloud · Identity protectionThe Defender for Cloud sensor changelog adds October 2026 GA entries for versions 0.11.9, 0.10.12, 0.9.70, and 0.8.63. The listed images remove trust in affected certificate authorities; review these releases when planning sensor updates.
Before enabling Security Gating, review applicable Azure Policy assignments with the policy administrator. If provisioning fails, use the Activity Log to identify the blocking assignment and pursue an Audit setting or narrowly scoped exemption where approved. Administrators can also plan Azure Linux 4 coverage, account for the updated Sentinel residency description, and review the listed sensor releases.
This period briefing was generated by AI from the tracked Microsoft Learn and Message Center changes.
The documentation now states that an ISOC workspace follows the same data residency and retention behavior as an Azure Log Analytics workspace and links to related Microsoft Sentinel and Log Analytics guidance.
The article title no longer includes “(Preview)”; its publication date and documentation metadata were also updated.
The October 2026 Linux release notes now list version 101.26091.0004, support for Azure Linux 4, and TCP socket bind telemetry. After gradual rollout, the telemetry will be available in Advanced Hunting through the DeviceNetworkEvents table.
The guide now explains that `Deny` policies targeting AKS managed clusters can prevent Security Gating provisioning with `RequestDisallowedByPolicy`, even for compliant clusters. It adds steps to identify the blocking assignment in the Activity Log and use `Audit` or a narrowly scoped exemption.
The changelog adds October 2026 GA entries for sensor versions 0.11.9, 0.10.12, 0.9.70, and 0.8.63. Their images remove trust in affected certificate authorities.
The page now explains missing admission-controller resources, how to diagnose failed AKS writes with RequestDisallowedByPolicy, which policies may conflict, and how to resolve the issue through narrowly scoped changes or Microsoft Support.
The page now states that Sentinel will process and store processed and configuration data in the onboarding destination regions or applicable existing Defender XDR regions. It also adds cases to the processed-data examples and removes the 21Vianet retirement notice.
The page now lists detection and recommendation fixes, updated Python end-of-support details, and MDVM support for Intel Endpoint Management Assistant and several Microsoft extensions, dated September 7–23 and October 3–9, 2026.
