You cannot view the Centralised exceptions from the clients if it is set from the SEPM.
User Defined Exceptions are the exceptions you create from the client locally.
if you want to check it from the client you will have to check it in the registry
To see the exclusions that the client creates on 32-bit computers, you can examine the contents of the HKEY_LOCAL_MACHINE\Software\Symantec\Symantec Endpoint Protection\AV\Exclusions
On 64-bit computers, look in HKEY_LOCAL_MACHINE\Software\Wow6432Node\Symantec\Symantec Endpoint Protection\AV\Exclusions