Hello,
Check this Thread with similar issue:
https://www-secure.symantec.com/connect/forums/how-do-i-temporary-enable-users-ability-disable-symantec-endpoint-protection-clients
In your case, you want to "Enable user's ability to disable Symantec Endpoint Protection on Clients for trobleshooting purpose (temporarily)."
Go to the Specific client group --> Policies --> Location specific setting --> Client user interface settings --> Edit settings --> check Allow user to enable and disable firewall
Check on client, as you can see tab is Enabled.
Secondly, check the AutoProtect Reloading Feature in SEPM >> Antivirus and Antispyware Policy.
Here are few Articles which may assist you to do the opposite of what you want -
How to prevent SEP features from being disabled in the client GUI in SEP 12.1
http://www.symantec.com/docs/TECH168990
How to block a user's ability to disable Symantec Endpoint Protection on Clients
Hope that helps!!