Re: Experience blocked outbound SSL VPN traffic
Ah, yes you may be blocking it if it's 10443. You will need to define a service for this under Policy & Objects and use it in the relevant outbound policies.
You can view logs on the firewall itself under Log & Report > Forward Traffic, but sometimes it is pretty limited as to what it will store. We use a FortiAnalyzer or you can send your logs to FortiCloud. Logging does have to be turned on for the relevant policies though (such as any deny policies), or you won't see what's happening.
I suppose the antivirus could be blocking the connection, but that depends on what you're using. I don't have much experience with that.