okay, I could be wrong here, so perhaps the LS admin can confirm or deny this...
I think what you are seeing is the attempted scan of this device as if it were a Windows machine because it is "part" of active directory. I think this is a WMI scan, which fails because it is a Linux machine. You will only be able to perform an SNMP scan on this machine, and the results will be somewhere under "device overview" on that shot you posted. Try searching for the IP in the search bar to see if you get multiple results, one will be what you posted and possibly one with be the results from your IP range scanning.