Hello,
In case you are running SEP 11.x, you can check the below article:
How to Verify if an Endpoint Client has Automatically Excluded an Application or Directory
http://www.symantec.com/docs/TECH105814
However, In case you are running SEP 12.x, I would suggest you to check this Article:
Verifying SEP Exceptions for Windows Server 2008 and Windows Server 2003 Domain Controllers
http://www.symantec.com/docs/TECH96048
and
Also check these steps as provided below:
Check the registry :-
FOR 32Bit :-
HKEY_LOCAL_MACHINE\SOFTWARE\Symantec\Symantec Endpoint Protection\AV\Exclusions\ScanningEngines\FileName
\Admin and \Client
v.Extensions
HKEY_LOCAL_MACHINE\SOFTWARE\Symantec\Symantec Endpoint Protection\AV\Exclusions\ScanningEngines\Extensions\
\Admin and \Client
FOR 64Bit :-
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Symantec\Symantec Endpoint Protection\AV\Exclusions
\FileExceptions and \NoScanDir
\Admin and \Client
Secondly, In VDI environment, there are other ways to create exceptions, check this Thread:
https://www-secure.symantec.com/connect/forums/virtual-image-exception-tool
Hope that helps!!