List of all offline resources

Hello All.

I had a query and if you can please help me with the solution. I want a list of all offline machines which are there in our network but are not reporting in HW asset report (in Reports >> Discovery and inventory >> Inventory >> Hardware  >> Hardware inventory search report). Is there a way to get this information?

Reason being, this report only reports those machines which are live and running at that point of time. If I shutdown the machine, it doesn't appears in this report. I will like a mechanism to either retain all the machines from disappearing or if I can get list of all resources which are offline or didn't report when a HW report is fetched.

Thanks again.

Regards.