Looking at the specs I can't tell what the embedded OS of that device is or if it includes any management options.
Worst Case, UDD will detect the Device via IP but won't be able to do anything with it
Likely Case, Using Data Analytics (Asset Control) you could detect and query the device using SNMP to get greater detail about the device and potentially then launch configuration consoles for supporting the device
Best Case, the embedded OS can be installed with a LANDesk agent to greater functionality (this is the least likely case)
I'd ask the question of Dell to confirm which of these cases would fit.
As for what these devices are accessing; if you are providing a VDI environment, then LANDesk can be managing the desktop environment that you publish out to them.
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Normally thin OS/Zero clients are some form of Linux distro. LANDesk fully supports HP's Thinpro in 9.5. I would think that each vendor has this OS implemented somewhat differently. So I would suggest at least using 9.5 for your best chance, but with dealing with these animals in the past I would not get you hopes up. HP's yes, others maybe, just test.