Error when trying to install Azure DevOps agent for an environment resource (vm)

Question

I'm getting this error when trying to install Azure DevOps agent for an environment resource (vm)

HTTP Status: InternalServerError, AFD Ref: Ref A: 11E67472AA3845BBA59C641F3902CE5E Ref B: BL2AA2011006036 Ref C: 2025-10-27T20:39:57Z

Tried multiple times, checked permissions, what could be the issue?

Answer 1

Hi Adrian Stoica,

Thanks for reaching out to Microsoft Q&A.

The Azure VM agent installation relies on the Windows Management Instrumentation (WMI). If WMI is not working properly, it can cause installation failures.

• Open an elevated Command Prompt and run this command:

wmic /namespace:\\root\default Class StdRegProv Call GetDWORDValue hDefKey="&H80000002" sSubKeyName="SYSTEM\CurrentControlSet\Services\Winmgmt" sValueName=Start

• If you're using Windows Server 2025 or later, you can check this using PowerShell:

Invoke-CimMethod -ClassName StdRegProv -MethodName GetDWORDValue -Arguments @{sSubKeyName = 'SYSTEM\CurrentControlSet\Services\Winmgmt'; sValueName = 'Start';}

Run the following command to verify the WMI repository:

winmgmt /verifyrepository

If there are any issues related WMI, you might need to salvage the repository using below command:

winmgmt /salvagerepository

As you are getting Internal error, look at the installation log files for specific error details. You can find them at msiexec.log, VmAgentInstaller.xmlfiles.

After checking WMI and logs, try the VM agent installation again. Post-installation, check if the RdAgent service is running using:

wmic service rdagent list brief

Hope it helps!

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