What is this?

This knowledgebase contains questions and answers about PRTG Network Monitor and network monitoring in general.

Learn more

PRTG Network Monitor

Intuitive to Use. Easy to manage.
More than 500,000 users rely on Paessler PRTG every day. Find out how you can reduce cost, increase QoS and ease planning, as well.

Free Download

Top Tags

View all Tags

Are Windows Device CALs required for monitoring via SNMP or WMI?



One of our service providers would like to set up a Windows Monitoring System, in which the network devices (switches and AP's) are monitored via SNMP. This raises the question of whether in this case a Windows CAL would be necessary for each network device.


licensing microsoft prtg

Created on Oct 9, 2018 12:44:19 PM

1 Reply



Hello there,

For monitoring Windows systems, device CALs might be relevant, though I would recommend to ask directly at Microsoft for your individual needs, since this seems to change like every year. In some "licensing constellations" user CALs might be sufficient as well. For non-Windows systems Windows device CALs do not matter.

Kind regards,


Created on Oct 9, 2018 12:58:39 PM by  Erhard Mikulik [Paessler Support]

Disclaimer: The information in the Paessler Knowledge Base comes without warranty of any kind. Use at your own risk. Before applying any instructions please exercise proper system administrator housekeeping. You must make sure that a proper backup of all your data is available.