Is anyone familiar with a method by which the number of used licenses can be determined programmatically or by using a command line tool, vs logging in to the admin client and manually performing the check?
Try the below command and see if it helps... /opt/OV/support/nnmtwiddle.ovpl invoke com.hp.ov.nms.licensingejb:mbean=LicensingInterface NNMConsumption -u <NNMiusername> -p <password>
Kindly note , this command only gives NNM license consumption count. If you also have iSPI for NNMi say for example PerfSPI then you have to use the right mbean object and Operation. For more details you can check the jmx-console . But be cautious using jmx console as HP do not support it .