The location of "krb5.conf" file has been changed in Spotifre version 10.3 and higher.
Resolution
The "krb5.conf" file is located at the following location for Spotfire version 10.3 and higher. ===== <server installation dir>\tomcat\spotfire-config\krb5.conf =====
For all the versions earlier than 10.3, it is located under "<installation dir>\jdk\jre\lib\security".