On Premise Adobe Connect Edge Security

We are currently using on Premise Adobe Connect 9.5.2.  It consists of the meeting server on our internal network, and the edge server in our DMZ, it works well.  It is using directory authentication via LDAP.  We want to set it up so that users coming in from the internet can only enter meeting rooms as guests.  In other words, turn off the ability for users to connect in from the internet and sign in using their active directory credentials, then set up a meeting as a host.  We only want them to have that ability when they are on our internal network.  Is this possible?   Thank you!