You have Oracle Solaris 10 Servers, Oracle Solaris 11.3 Servers and you want to install SEP 14 on these servers. However, you are unable to see Oracle Solaris in the SEP supported systems.
As of now, SEP has no support for Linux Oracle Solaris servers.
Here you can find the list of Supported kernels of Symantec Linux Agent.
Oracle Solaris servers can be protected using DCS product, find here the Supported kernels and operating systems for Data Center Security 6.8.