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A trial license allows the customer to evaluate the product.
Applicable to both Enterprise and Small Business Edition
Enterprise Edition is 60 days validity with no grace days
Small Business Edition is 30 days validity with 30 days grace.
Provides hard enforcement for both Enterprise and Small Business Edition versions
This is the only license that provides hard enforcement on Enterprise.
After the trialware license expires, you must activate a paid license to retain full product functionality. You do not have to uninstall the trial-licensed version to convert your Symantec Endpoint Protection installation to a fully licensed installation.
The trialware license expires 60 days after you install the product.
See Purchasing licenses.
Refer this article:
About the trialware license
http://www.symantec.com/docs/HOWTO55075
Activating your new or renewed Symantec Endpoint Protection 12.1 product license
http://www.symantec.com/docs/HOWTO55294
Helpful Article: SEP 12.1 & license concept.
https://www-secure.symantec.com/connect/articles/sep-121-and-license-concept