/Server/Windows template (by default) uses the SNMP Informant extension to SNMP to gather those graphs. You need to check what perf template you're using and maybe create one if you need to. The Device_WMI perf template uses WinPerf (which I think is perfmon based, not actually WMI) uses a login and queries Windows vs SNMP. Did you install the Core Zenpacks to get this?
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James Pulver
ZCA Member
CLASSE Computer Group
Cornell University
