Poll Windows Server metrics natively over WMI, without installing a third-party agent on every machine.
Use a dedicated, least-privilege account rather than a domain admin credential; membership in Performance Monitor Users and Event Log Readers is enough for standard metrics and logs.
WMI uses DCOM, which needs TCP/135 plus a range of dynamic RPC ports; on a segmented network, either open the dynamic range or fix it to a narrow band in Windows' RPC configuration.
In Devices > Add device, choose WMI, enter the service account credentials, and Linivo polls CPU, memory, disk and the services you select to watch.