Hi,
Check this articles.
Configuring a Centralized Exceptions Policy
http://www.symantec.com/docs/HOWTO27313
Creating Centralized Exception Policies in Symantec Endpoint Protection Manager
http://www.symantec.com/docs/TECH104326
Configuring a centralized exception for a detected process
http://www.symantec.com/docs/HOWTO27305
Configuring an exception to force TruScan proactive threat scans to detect a process
http://www.symantec.com/docs/HOWTO27304
About centralized exceptions for TruScan proactive threat scans
http://www.symantec.com/docs/HOWTO27316
How to configure Tamper Protection in Symantec Endpoint Protection 11.0
http://www.symantec.com/business/support/index?page=content&id=TECH102529&locale=en_US