Hello, I'm experiencing the following problem on a two nodes WS2012 failover cluster, starting when I did the first setup. After 10-12 days up, I cannot connect anymore with failover cluster manager, I get "invalid query". Also, if from one of the hosts I try to connect to hyper-v manager, I get an error related to missing permissions. In the logs I cannot find anything relevant (please note that guest VM are always up&running also if I cannot connect to the cluster). I configured on the two nodes a powershell script in order to periodically send an email with the output of the command "get-clusterresource" and this morning I noticed I didn't receive the email. So I tried to run locally this command on an elevated Powershell prompt and I got "AuthorizationManager check failed". Searching online, I found that it could be a WMI problem, so I restarted the "Windows Management Instrumentation" service on the two servers and... voilà, I could connect to Failover Cluster and to Hyper-V manager. Now, I identified the process to restart to bring it back online, but I'd like to identify the cause. Any suggestion?
edit: another thing I noticed after restarting WMI process, I don't know if it is relevant
"The root\mscluster namespace is marked with the RequiresEncryption flag. Access to this namespace might be denied if the script or application does not have the appropriate authentication level"