Hi team, I'm going crazy with these scenarios, because in one of them 3CX phones for Windows show the message when register "...couldn't connect with 3cx Phone System Web API...", so I suppose that is why we cannot use Webmeeting conferences (3cx online servers). Site 1: 3cx v14 lab, public FQDN, no firewall. --> OK!!!! (NO web api message, can create webconferences...) Site 2: 3cx v14, FQDN not published to internet, firewall but all openned incoming/outcoming. --> FAIL!! (web api message, Create Conference option does not appear). Tested with same version of 3cx phone for Windows (v14 and v15). Both of them fails on Site 1. Any ideas? Regards!