In virtualized environment with Hyper-V, the process of how SQL Diagnostic Manager collects and presents metrics is slightly different from that of a VMware setup. To successfully collect Hyper-V host metrics, the user needs access to the WMI credentials on the host server. These credentials are established on the Virtualization Host Configuration window (Tools >VM Configuration >New or Tools >VM Configuration >View/Edit)
In addition, to successfully collect VM metrics, the user needs access to the WMI credentials on the VM. These credentials are established under on the OS Metrics tab of the Monitored SQL Server Properties window (right-click on the monitored instance name and select Properties).