I have a lot of these alerts in my LFDS Event Viewer currently. It seems tied to LFDS trying to check in on software on servers that were recently decommissioned.

As you can see from the log below, it complains that the host cannot be found, but doesn't actually say which host it's trying to reach. Whether troubleshooting an error or simply removing the machine registration from LFDS, it would really be helpful to include the name of the host that cannot be found.

System.Net.Sockets.SocketException (0x80004005): No such host is known
   at System.Net.Dns.GetAddrInfo(String name)
   at System.Net.Dns.InternalGetHostByName(String hostName, Boolean includeIPv6)
   at System.Net.Dns.GetHostAddresses(String hostNameOrAddress)
   at System.Net.Sockets.UdpClient.Connect(String hostname, Int32 port)
   at Laserfiche.LicenseManager.Notification.NotificationManager.LegacySender(ActivityEvent actEvt, Application app, Host host)

Type:
System.Net.Sockets.SocketException

Stack Trace:
   at System.Net.Dns.GetAddrInfo(String name)
   at System.Net.Dns.InternalGetHostByName(String hostName, Boolean includeIPv6)
   at System.Net.Dns.GetHostAddresses(String hostNameOrAddress)
   at System.Net.Sockets.UdpClient.Connect(String hostname, Int32 port)
   at Laserfiche.LicenseManager.Notification.NotificationManager.LegacySender(ActivityEvent actEvt, Application app, Host host)