Whenever you want to use GreenLight to monitor Windows Hosts (perf counters, services, exchange, ...) then you could end up in getting http 401 error indicating that the authentication process failed during the initial connection.
You would see then the following error message
09:24:34.300 [http-bio-443-exec-5] ERROR 122:DefaultRemoteShellService -Received fault for remote shell create request
com.panagenda.commons.wsman.service.transport.HttpResponseFaultException: [401]
Please check the following things to solve this error:
Please adjust the CbtHardening Setting to Relaxed by using the following RegKey
HKLM\Software\Policies\Microsoft\Windows\WinRM\Service\CbtHardeningLevel
Note: Please check your GPO Settings as well!
Windows Components\Windows Remote Management (WinRM)\WinRM Service
Useful Links: