Hi,
SEP 11.x licensing is basically just a "paper" license product. However, with SEP 12.1 the licensing is a "software" license product and uses a license file. It is important to become familiar with this license concep
To enable the submission of reputation data from an unmanaged client, you must install a paid license on the client
Licensing an unmanaged client
http://www.symantec.com/docs/HOWTO55368
Licensing enforcement rules
http://www.symantec.com/docs/HOWTO55135
Check this article as well: SEP 12.1 & License concept
https://www-secure.symantec.com/connect/articles/sep-121-and-license-concept