I have been testing out V15 on a VM, I had some problems around SMTP mail server so I did a fresh install on a clean VM (thinking it was a problem with the original machine) but now I get the attached error every time I try to install straight after I type in the admin password. I also note that the FQDN entry disappeared on my account on erp.3cx.com (screenshot attached) The reason I reinstalled is because I couldn't get the SMTP mail server working. I followed these steps - http://www.3cx.com/blog/docs/gmail-mail-server/ to get gmail working but when pressing test nothing happens and it just times out after a while. I tried Office365 too and it errors with “The remote certificate is invalid according to the validation procedure”. I even tried turning Windows Firewall off completely, nothing helped. Any help would be appreciated!