Security Policy Errors

How to Troubleshoot an Intune Firewall Rule Not Working

Anum Mushtaq Oct 14, 2026 868 views

Question details

The user needs to resolve an issue where an Intune Endpoint Security firewall rule is deployed but fails to function or enforce traffic.

How to Troubleshoot an Intune Firewall Rule That Is Not Working

Product: Microsoft Intune
Device & OS: Windows
Scenario: Deploying an outbound traffic firewall rule for a specific executable via Intune Endpoint Security.
Observed behavior: The firewall rule appears on the device and shows as enabled in PowerShell, but the PrimaryStatus is Inactive and the EnforcementStatus is OptimizedOut.

Before you start

Ensure you have administrative access to the Microsoft Intune admin center and local administrator privileges on the affected Windows device to run PowerShell diagnostics.

Solution 1Recommended

Review Policy Conflicts and Local Overrides

Check if local Windows Defender Firewall rules or conflicting Intune policies are superseding your deployed rule.

When an Intune firewall rule displays an Inactive or OptimizedOut status, it often indicates that a local setting or a more restrictive MDM policy is taking precedence over the deployed rule.

Check for conflicts in Intune

Open the Microsoft Intune admin center, navigate to Endpoint security > Firewall, and select your firewall policy to review the device assignment status for any reported conflicts.

Review local Defender Firewall settings

On the affected local device, open Windows Defender Firewall with Advanced Security to verify if a pre-existing local rule is overriding the MDM policy.

Verify profile settings

Ensure that the firewall profile (Domain, Private, or Public) targeted by your Intune rule matches the active network profile on the endpoint.

Review Policy Conflicts and Local Overrides

Solution 2

Collect Diagnostic Logs and Escalate

Because the rule shows as 'OptimizedOut', you should collect Intune logs and consult Microsoft Support for advanced enforcement troubleshooting.

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Frequently Asked Questions

What does an OptimizedOut enforcement status mean in Intune?

OptimizedOut typically indicates that the firewall rule was evaluated by the system but was not applied. This happens when the rule is redundant, overridden by a more restrictive policy, or conflicts with another active configuration on the device.

How can I check the status of Intune firewall rules locally?

You can use PowerShell on the Windows device by running the 'Get-NetFirewallRule' cmdlet or by generating the MDM diagnostic report from Windows Settings to see the precise enforcement status and source of your rules.

Why is my deployed Intune firewall policy showing as Inactive?

An Inactive status usually means the policy has been successfully delivered to the device but is not actively filtering traffic. This is often caused by local firewall settings taking precedence, profile applicability mismatches, or overlapping rule sets.

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