Apache Tomcat is used for all SEPM 12.1.TABs Like Policies,Clients,Monitors,Licence,Admin and Reports tabs.
see more info Mick2009 and other comments
https://www-secure.symantec.com/connect/forums/tomcat-symantec
conf.Properties : SEPM configuration setting are save in conf.Properties
see Rafeeq articles
https://www-secure.symantec.com/connect/articles/things-you-can-do-confproperties-file-and-serverxml-file-sepm
You can find all sepm related query in sepm knowledge based
https://support.symantec.com/en_US.html