Hi Mukunthan,
Now I can see why the SPNego is failing. The following error is written to the traces.
NTLM token received in authorization header
This message tells us that the system is receiving an invalid token and cannot process it. This issue is actuallyoutside of the SPNego configuration and is caused by a
problem on the Client side or domain controller.
Please have a look at the following KBA regarding this
1649110 - SPNego for Kerberos Authentication: NTLM token received in
authorization header
Please try the suggestions given there to resolve or at least figure
out as to why this is happening.
Regards,
David