I am trying to troubleshoot NPS authentication issues for Wireless connectivity. When User is trying to connect , can't connect to this network, event ID 6273 with reason code 7 specified domain does not exist. NPS role is on PDC, registered in AD. User member of the domain(admin). I have tried the registry edit HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\RasMan\PPP\ControlProtocols\BuiltIn New entry DefaultDomain to force NPS to use FQDN instead of NETBIOS name as found in few threads. Not effective. NPS is still trying to Authenticate using NETBIOS Name. NPS is rejecting Access request from Access point. Tried uninstalling AV. Not effective. Tried using different type of authentication. Same error. Is this something related to Certificates installed on NPS. As far as I checked, subject name matches hostname, intended purpose is client and server authentication, not expired, root ca is present in certificate store. Is there anything else to be checked on certificate side. really stuck with this. Can't provide error message and details due to security reasons.
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