Hostnames are missing

Make sure that you see the MAC Address and the IP Address of the Endpoint. The Solarwinds Server takes the IP Address and does a Reverse DNS lookup against the DNS Server the Solarwinds Server OS has configured to pull Hostname data.

Sean is right, hostnames are gathered through reverse dns lookup.  To add to that Hostname can also be gathered via powershell script to the dns server as well as a few other methods when talking with the DNS

server.

For basic troubleshooting, kindly run the following commands below from the Orion Server(Server wherein the IPAM/UDT is installed)

From Powershell

[System.Net.Dns]::GetHostEntry("xxx.xxx.xxx.xxx")

From command prompt

ping -a XX.XX.XX.XX

nslookup XX.XX.XX.XX

XX.XX.XX represents the IP address

Below are sample screenshots.

Thanks.  We configured the DNS reverse Lookup zone.  Thanks or the help

Helpful.  Thanks a lot.