SCVMM host refresh does not work

Error (20552)
VMM does not have appropriate permissions to access the resource C:\Windows\system32\qmgr.dll on the xxx server.


Recommended Action
Ensure that Virtual Machine Manager has the appropriate rights to perform this action.

Also, verify that CredSSP authentication is currently enabled on the service configuration of the target computer xxx. 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"}


Warning (13926)
Host cluster xxx was not fully refreshed because not all of the nodes could be contacted. Highly available storage and virtual switch information reported for this cluster might be inaccurate.

Recommended Action
Ensure that all the nodes are online and do not have Not Responding status in Virtual Machine Manager. Then refresh the host cluster again.



Solution:

https://support.microsoft.com/en-us/kb/971825


Verify that runas srvscvmm account  is local admin on the server and member of group Virtual Machine Manager Servers