Hi, Just setup 3CX Cloud are having trouble autoprovision the phone with Tenant 1. Because we are using a Sonicwall TZ210, we disabled STUN. Because we have only a single public ip with many servers behind it, we had to remap ports 80 to 5050, and 443 to 9443. Our setup looks as follows: 3CX Server 192.168.15.5 Stun Disabled Session Border Controller running on Workstation 192.168.15.6 Ports Forwarded on Sonicwall to 3CX Server for Tenant1 5050 to 80 9443 to 443 4502 4503 5000 5060 TCP UDP 5061 5090 TCP UDP 5550 5599 When we call the DID, we successfully hit Extension 10's voicemail, so we know the configuration is working at the server level. Now to provisioning the phone. On 3CX Server, Under Extension 10, we setup Phone Provision as follows: MAC ID: xx:xx:xx:xx:xx (specific MacID) Model: Yealink T46 Select Interface: server.company.com Select Provisioning Method: 3CX Session Border Control On the Yealink T46, we have disabled Trusted Certificates. Then, under AutoProvision, we enter the following: https://server.company.com/tenant1/provisioning/XXXXXX This does not work for autoprovisioning the phone. Given we port forward 9443 to 443, we try the following: https://server.company.com:9443/tenant1/provisioning/XXXXXX This appears to autoprovision the phone, but then upon reboot, three things are true: Cannot make calls Cannot receive calls On 3CX Server, phone does not appear under Phones and Extension 10 is still not registered. Also, even though we specifically added port 9443 to the AutoProvision URL, it is automatically removed from AutoProvision url after reboot. It changes back to: https://server.company.com/tenant1/provisioning/XXXXXX We have been trying to autoprovision the phone with in the LAN, so do we need to take the phone offsite (i.e. remote location)? Is changing port 443 to 9443 not supported? Is there anything else we should be doing to get this to successfully provision and register within the 3CX server panel? Any help would be greatly appreciated. Thank you.