Upgrade 3cx V18 on windows server to V20 on linux server with own fqdn

[Thomas Six]

Can you give us the procedure to upgrade a 3cx V18 on windows server to V20 on linux server with own fqdn? Is there a solution to change the fqdn to a 3cx one as well?

 

[bitn2]

Take the backup from your pbx without fqdn and install the v20 from iso. The installation is really straight forward. If you want to stay at your own fqdn you need your certificate when you install the pbx.