Look in the 'Content Filter (HTTP)' log to see the FQDN of the chat server(s), then add that to 'Always block'. For Google chat, it's something like b.google.com.
Cheers - Bob
Sophos UTM Community Moderator Sophos Certified Architect - UTM Sophos Certified Engineer - XG Gold Solution Partner since 2005
Look in the 'Content Filter (HTTP)' log to see the FQDN of the chat server(s), then add that to 'Always block'. For Google chat, it's something like b.google.com.
Cheers - Bob
Sophos UTM Community Moderator Sophos Certified Architect - UTM Sophos Certified Engineer - XG Gold Solution Partner since 2005