DeviceManagementExtension Failed State

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Issue: The DeviceManagementExtension is in a failed state on all Azure Stack HCI servers after deleting test VMs and shutting down the servers. All other extensions are in a healthy state.

Cause: The issue likely occurred due to changes made before the shutdown, such as deleting test VMs, which may have disrupted the extension’s configuration or operation.

Here are some steps to troubleshoot and potentially resolve the issue:

• Look at the logs for the DeviceManagementExtension to identify any specific errors. You can find these logs at C:\ProgramData\GuestConfig\extension_logs\Microsoft.Edge.DeviceManagementExtension\.
• Make sure that the VM Agent is running and reporting a Ready status. The VM Agent is crucial for managing and executing extensions. If it’s not running, the extensions won’t work correctly. You can check the VM Agent status using Azure PowerShell:

Get-AzVM -ResourceGroupName <ResourceGroupName> -Name <VMName> -Status

• Sometimes, removing the failed extension and reinstalling it can resolve the issue. You can do this via Azure PowerShell:

Remove-AzVMExtension -ResourceGroupName <ResourceGroupName> -VMName <VMName> -Name "DeviceManagementExtension"
Set-AzVMExtension -ResourceGroupName <ResourceGroupName> -VMName <VMName> -Name "DeviceManagementExtension" -Publisher "Microsoft.Compute" -ExtensionType "DeviceManagementExtension" -TypeHandlerVersion "1.0"

• Make sure there are no network issues that might be preventing the extension from communicating with Azure.
• Since the issue started after deleting test VMs, review any other changes made around that time that might have affected the extensions.

For more detailed troubleshooting steps, you can refer to the documentation on Troubleshooting Azure Windows VM extension failures
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