Running 6.3.x. Yes you can enable Onguard with VIA. What I'm looking for is the actual config for VIA - ie server to connect to in order to download profiles or just push the profile.
I don't think that part is in the user guide, just enabling the OnGuard agent to install VIA too.
I only see this -
Install VPNComponent: Enable this option to install the OnGuard VPN
component.