change FQDN in version 20

[Soli]

How can I cahnge the FQDN in version 20

in 1 I can uncheck the FQDN and upload backup file in version 20 there is no way to do so

 

[Alphabetic]

Give this a read

https://www.3cx.com/community/threads/v20-change-fqdn.124814/