Excluding file extensions from virus and spyware scans
You can add multiple file extensions to an exception. After you create the exception, you cannot create another extensions exception for the same policy. You must edit the existing exception.
You can add only one extension at a time. If you enter multiple extension names in the Add text box, the policy treats the entry as a single extension name.
See Creating exceptions for Symantec Endpoint Protection
To exclude file extensions from virus and spyware scans
On the Exceptions Policy page, click .
Under Exceptions, click .
In the text box, type the extension that you want to exclude, and then click .
Add any other extensions to the exception.