How to configuring Thresholds for Hyper-V Host and VMs

To configure the threshold values and apply the template,

Go to Settings → Configuration → Device templates.
You can find the HyperV Server and HyperV Virtual Machine templates for the hosts and VMs respectively. Click on the required template.
Click on Edit Thresholds button to configure the threshold and rearm value for the required monitors.
Click OK.
Click Associate for the devices to inherit the configurations in the template. While associating the template, click on Apply & Overwrite for the devices to remove the old and add the new configurations in the template.

Note: To edit the threshold values of a single host, go to its snapshot page, (Navigate to Inventory -> Devices and then click on a device to view its snapshot page) and then click on the Monitors tab. Click on the Edit icon of a monitor to edit its threshold values.

You can also configure adaptive thresholds for CPU utilization, Memory Utilization and Response Time monitors globally across OpManager from Settings -> Monitoring -> Monitor Settings. Learn more about Adaptive Thresholds.