Symantec Endpoint Encryption 11 - Encrypting Removable Media

Hello all,

I am testing the encryption of a removable device. Using the GPO template provided, I try to configure the option to encrypt all files when they are accessed.

But it is not working, the GPO applies successfully, but the encryption is not happening.

what oculd be the problem? Is there a way to force the encryption of all files on a removable storage?

Thank you