EICAR Test virus not being picked up over SSLVPN

Hi there

I'm comparing Sonicwall to SophosUTM , more so around the end device protection. In this case i'm transfering a EICAR test virus between a SSLVPN user on both the Sonicwall and the SophosUTM via SMB/CIFS, and the sophos does not detect the virus however the Sonicwall does, and blocks the transfer.

Is there a setting that will allow the Sophos to pickup the EICAR/any malware for SSLVPN user traffic. I identify SSL VPN Users as risk and would like to ensure we have protection around that.

Thanks