Hi, I have been wrestling with 3CX all week and I think I have figured out most of the issues. There is one issue that I have no idea how to resolve. I have 3CX 15.5 installed on a VM and it's working for the most part. I did encounter a user that attempted to join a conference call receive the error message: "Call failed, declined". It was trying to register with the external FQDN when the call is within the office VPN. Is there a way to turn off the external FQDN? Thank you!