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Introduction
When migrating from third-party antivirus (AV) solutions to Microsoft Defender, devices may automatically enter passive mode. This blog post provides a step-by-step solution for troubleshooting and resolving the issue of devices stuck in passive mode.
Why Defender Automatically Enters Passive Mode
Devices can enter passive mode due to residual third-party AV registry entries and drivers. This occurs when third-party AV solutions are not completely uninstalled from the system during the migration process.
Residual Third-Party AV Registry Entries and Drivers
To ensure a smooth transition to Microsoft Defender, it’s essential to uninstall third-party AV solutions completely. Use vendor cleanup tools for a thorough removal.
ForceDefenderPassiveMode Registry Key Behavior
Once all third-party AV solutions are removed, set HKLM\SOFTWARE\Policies\Microsoft\Windows Advanced Threat Protection\ForceDefenderPassiveMode to 0 and reboot the device.
Server-Specific Passive Mode Considerations
For Windows Server 2016 onwards, ensure devices are properly onboarded to Microsoft Defender for Endpoint (MDE) first. Some servers should remain passive if running another approved endpoint detection and response (EDR) solution.
Verifying Current Mode with Get-MpComputerStatus
Use the following PowerShell command to verify the current mode of Microsoft Defender for Endpoint:
“`powershell
Get-MpComputerStatus | Select AMRunningMode
“`
Conclusion
Struggling with devices stuck in passive mode in Microsoft Defender for Endpoint? By following the steps outlined in this guide, you can troubleshoot and resolve the issue. For comprehensive training on Microsoft Cloud Security, including Microsoft Defender for Endpoint, visit our Microsoft Cloud Security Training page.
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Written by Mohammed Akhter
Founder of ITP Training. 50,000+ students trained across 30+ countries in Microsoft endpoint and cloud security. Learn more →