Intune and Windows 11 26H2: new security baseline and Administrator protection
News date: 2026-10-13 · Sources reviewed: 2026-11-02
A Microsoft security baseline can accelerate hardening, but applying it across an entire fleet without testing creates avoidable operational risk. During the week of October 5, 2026, Microsoft announced the Windows 11 26H2 baseline in Intune. On October 13, it also highlighted changes related to Administrator protection when Windows security baselines are applied. Organizations should compare settings, validate business workflows and pilot the new configuration before scaling up.
What the 26H2 baseline changes
The release contains new settings, revised defaults and updated security guidance. Existing Intune baseline profiles do not automatically move to the new version: administrators must create a new profile or update an existing one. That matters when organizations already use custom firewall, BitLocker, UAC or other configurations. Microsoft notes that Configure NetBIOS settings is not part of this baseline release because it is not yet supported on in-market Windows builds.
- Record the current baseline version and group assignments.
- Compare recommended defaults against documented business exceptions.
Understanding Administrator protection correctly
In its October 13, 2026 message, Microsoft said Administrator protection becomes enabled by default through applicable Windows 11 security baselines after the October security update, covering versions 24H2, 25H2 and 26H2. This does not mean that every Windows 11 device turns the feature on regardless of its configuration. Administrator protection aims to enforce least privilege and controlled elevation, but its behavior may affect support tools and workflows that rely on particular UAC behavior.
- Review User Account Control: Configure type of Admin Approval Mode.
- Review User Account Control: Behavior of the elevation prompt for administrators running with Administrator protection.
- Test administrative tools and remote-access scenarios.
Avoid conflicting management policies
The same device setting may be configured through a security baseline, Settings Catalog, Endpoint Security, Group Policy or another MDM profile. Different values can produce policy conflicts or unexpected behavior. Microsoft explicitly warns that baseline defaults can be restrictive and that certain firewall settings require validation. Give each control a clear policy owner and resolve overlaps through documented changes rather than ad hoc disabling of security settings.
- Map overlapping Intune policies, GPOs and co-management responsibilities.
- Review per-setting status and conflicts on pilot endpoints.
- Document justified exceptions for legacy applications.
A four-stage rollout plan
First, capture the current configuration and define measurable acceptance criteria. Second, assign the 26H2 baseline to a small group of representative Windows 11 devices, covering different hardware and user roles. Third, test BitLocker recovery, business apps, VPN, RDP, elevation prompts and common daily tasks. Fourth, review results and extend the rollout through controlled rings with rollback readiness and helpdesk communications.
- Track policy success, support incidents and remediation time.
- Maintain documented exceptions for incompatible devices.
- Revalidate the configuration after subsequent Windows updates.
Business value beyond a compliance indicator
An Intune compliance status alone is not proof of an operationally safe deployment. The real value is a repeatable process that improves security while preserving business continuity. VALUE360 can support endpoint-policy inventories, pilot planning, compliance checks and phased rollout, separating Microsoft recommendations from each organization’s operational requirements.
Do not replace a working baseline without a configuration comparison. Validate Administrator protection, overlapping policies and critical business applications first.
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