I recently had to troubleshoot an issue on a System Center Virtual Machine Manager 2012 (SCVMM) SP1 server.

All the managed hosts were in a state of “Needs Attention”.  When viewing the status screen for the host, the WinRM status was critical.  Pressing refresh in the host status screen resulted in the error message:

VMM does not have appropriate permissions to access the resource  on the %SCVMMSERVER% server.

Also, verify that CredSSP authentication is currently enabled on the service configuration of the target computer %HOSTSERVER%. To enable the CredSSP on the service configuration of the target computer, run the following command from an elevated command line: winrm set winrm/config/service/auth @{CredSSP=”true”}

The event log also contained the error:

The Virtual Machine Manager management server could not copy a required Hyper-V authorization file to %HOSTSERVER%.

After trying many things without success, I attempted a re-install of SCVMM.  This also failed with the message:

VMM does not have appropriate permissions to access the resource  on the %SCVMMSERVER% server.

The SetupWizard.log contained the message:

VMMPostinstallProcessor threw an exception: Threw Exception.Type: Microsoft.Carmine.WSManWrappers.WSManProviderException, Exception.Message: VMM does not have appropriate permissions to access the resource  on the %SCVMMSERVER%

The problem turned out to be caused by the proxy configuration on the SCVMM server.  In order to reset the proxy configuration I opened an elevated command prompt and ran “netsh winhttp reset proxy”. I was then able to re-install SCVMM successfully.