I just installed the NPS for the first time on our domain and authentication fails with message " There is no domain controller available for domain tp.dom" . We have two domain controllers and both are working fine. I ran nltest with various options and all the commands are successfully completed and finds the domain controllers. Also I can login to NPS server using TP.DOM\username. I tried few different users and it's successfully. I am not sure why NPS can't locate the domain controller.
So I tried on a different machine and getting the same error. Both run windows 2008 R2. Our DCs are 2003 R2.
Below is the message from NPS trace.
[5424] 07-08 18:54:32:124: Failed to connect to the cached DC, try DC locator ...
[5424] 07-08 18:54:32:124: Could not open an LDAP connection to domain TP.DOM.
[5424] 07-08 18:54:32:124: NTDomain::getConnection failed: The specified domain either does not exist or could not be contacted.
[5424] 07-08 18:54:32:124: Retrying LDAP search.
[5424] 07-08 18:54:32:124: Could not open an LDAP connection to domain TP.DOM.
[5424] 07-08 18:54:32:124: NTDomain::getConnection failed: The specified domain either does not exist or could not be contacted.
[5424] 07-08 18:54:32:124: No AUTHORIZATION extensions, continuing
[5424] 07-08 18:54:32:124: Added EAP Failure packet
Any help is appreciated. - thanks.