You can verfy here
In 32 bit
Browse to the registry key: HKEY_LOCAL_MACHINE\SOFTWARE\SYMANTEC\SYMANTEC ENDPOINT PROTECTION\AV\EXCLUSIONS
Note: On 64bit window machines the registry path is:
HKEY_LOCAL_MACHINE\Software\WOW6432Node\Symantec\Symantec Endpoint Protection\AV\Exclusions
How to Verify if an Endpoint Client has Automatically Excluded an Application or Directory