Thanks for good info,
I add more Infos. UDT is using DNS to resolve the hostname. But more accuretely I think it uses A records in Forward lookup Zone to resolve from IP to hostname first, if the first step is unsuccessful, it continues to use PTR records in Reversed Lookup Zone to map hostname to one IP.
In my network, I use Secure DNS update settings, so that with computers not joined in my Domain, it cannot create A record in Forward lookup Zone, but a PTR record in Reversed Lookup Zone is OK.
Please correct me if I 'm wrong.
I'm getting the issue that hostname column in Manage Subnet & IP does not update correctly
"I'm getting the issue that hostname column in Manage Subnet & IP does not update correctly"
At first glance I do not have the same problem as you. What does the IPAM Address History show you for the hostname for that IP? Was the IP given to another hostname? What is your scan interval set for in IPAM for that subnet? The only thing I can think of is that your scanning interval is set higher than your UDT scan interval. This could possibly explain it.