After enabling Kerberos Authentication, WMI credentials fail in the SolarWinds Platform

After enabling Kerberos Authentication, my WMI credentials fail.

ERROR seen in C:\ProgramData\SolarWinds\Logs\Orion\Core.Collector.XXX.log

2025-04-17 20:06:13,077 [STP SmartThreadPool Thread #1] ERROR SolarWinds.Net.WMI.WmiConnectionBuilder - (null)  WmiConnectionBuilder.IsLocalAddress targetComputer:servername.DomainOne.net.Domaintwo.net exception: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 SolarWinds.Net.WMI.WmiConnectionBuilder.IsLocalAddress(String targetComputer)
2025-04-17 20:06:13,089 [STP SmartThreadPool Thread #1] ERROR SolarWinds.Net.WMI.WmiManager - (null)  WmiManager.Query request:IPADDRESS\root\CIMV2 [DomainTwo.net\Username], Query: [select PercentProcessorUtility from Win32_PerfFormattedData_Counters_ProcessorInformation where NOT NAME LIKE "%Total%"], Options: [LI], Retries: 2, RetryInterval: 10000 exception: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 SolarWinds.Net.WMI.WmiConnectionBuilder.IsLocalAddress(String targetComputer)
   at SolarWinds.Net.WMI.WmiConnectionBuilder.GetManagementPath(String targetAddress, String rootNamespace, Boolean autoCorrectRDNSInconsistency)
   at SolarWinds.Net.WMI.WmiConnectionBuilder.BuildConnection(String targetComputer, String rootNamespace, NetworkCredential credentials, Boolean autoCorrectRDNSInconsistency, AuthenticationLevel authentication, WMIAuthenticationMode wmiAuthenticationMode)
   at SolarWinds.Net.WMI.WmiConnectionBuilder.OpenConnection(WmiRequest wmiRequest)
   at SolarWinds.Net.WMI.WmiManager.Query(WmiRequest request)

Additional behavior of the issue.

WBEMTEST successful using both format DOMAIN\USERNAME or USERNAME@DOMAIN
WBEMTEST Query are all successful

Check the settings > All Settings> Polling Settings > Authentication Mechanism selected 'Kerberos'

This ERROR is because the domain attached to the credential, DomainTwo.net\Username, does not match the hostname, servername.DomainOne.net, to which the server resolves. SolarWinds requires a strict full name for the credentials when using Kerberos authentication. When the resolved FQDN does not match the credentials, it appends them together to try to create a hostname:  servername.DomainOne.net.Domaintwo.net

To resolve this problem, you need to use a full strict name credential that matches the resolved hostname of the server:

DomainOne.net\Username 

servname@DomainOne.net

When they match, SolarWinds will properly resolve the hostname, and the credentials should pass.