Get-WmiObject : The RPC Server is Unavailable. (Exception from HRESULT: 0x800706BA)

This week while working with some PowerShell scripts that retrieve WMI information from remote servers, I ran into an issue where I was able to return results from Windows 2008 R2 servers without issue but was unable to return results from Windows 2008 (non-R2) servers even though they had PowerShell 2.0 installed and as far as I could tell they were configured exactly the same as the Windows 2008 R2 servers.

Here’s the error I received:

Get-WmiObject : The RPC server is unavailable. (Exception from HRESULT: 0x800706BA)
At D:Get-MachineInfo.ps1:18 char:14
+ Get-WmiObject <<<< -class Win32_OperatingSystem `
+ CategoryInfo : InvalidOperation: (:) [Get-WmiObject], COMException
+ FullyQualifiedErrorId : GetWMICOMException,Microsoft.PowerShell.Commands.GetWmiObjectCommand

Enabling “Remote Administration” in the firewall on the Windows Server 2008 (non-R2) servers resolved this issue.

I verified this firewall exception was not allowed on the Windows 2008 R2 servers since those worked without issue, but it does appear that it’s required on the non-R2 servers.



  1. Mark Goodwin

    I ran into this error when I ran a script against a set of Windows XP machines within our environment. I was looking for the existence of a couple of particular servers in the mapped drives of around 800 machines. The script works against Win 7 machines but I get the same error as you did here working against XP machines. Our Windows firewall is OFF for all workstations. I’m leaning towards a possible impersonation issue with WMI.

  2. albertwt

    Thanks for sharing this Mike.

    I got this problem as well when executing WMI query against Windows Server 2012 R2.


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