Delete user-allowed applications exceptions from the SEPM

Hello,

In my current configuration, local admins can add their own exection on their SEP client. I want forbide this but first I would like to delete all exceptions already created on the clients. I can see them from the SEPM throught the Policies menu > Exceptions > clicking on an exception policy > on the Exeptions part, when I click on Add > Windows Exceptions > Application > then in the View list I select "user-allowed applications". But there is no way to remove them.

Does anyone know how to do it or I have to contact all my users one by one to tell them to remove their exceptions manually?

Thanks.