We have been using AGOL for all Survey123 data collection. We now have portal up and running with federated server. I can link to Portal from Survey Connect. What I am looking for is documentation on best practices or step-by-step guidelines on how to setup portal so that published surveys can be made available to users outside our network. Since Portal is contained within our firewall, how can I allow our field staff access, from say their mobile phone, without compromising security?