To change the public FQDN on an existing 3CX installation while keeping the same license key, what steps must be followed?

To change the public Fully Qualified Domain Name (FQDN) on an existing 3CX installation while retaining the same license key, it is essential to take a backup without the license key and then perform a reinstall.

This process is critical because when changing the FQDN, it’s advisable to ensure that your current installation and configurations are preserved while avoiding any complications with the original license key. By taking a backup that does not include the license key, you effectively safeguard your configuration settings while allowing for a clean installation that accommodates the change in FQDN.

Once you've completed the backup, you can then proceed to reinstall 3CX, entering your new FQDN. Following this, you can restore your settings to seamlessly transition your system to the new domain.

This approach ensures that you're not tied to an outdated FQDN and is particularly vital for maintaining all operational functionalities under the new public address. It preserves the integrity of the installation while ensuring compliance with licensing agreements, as changes to the FQDN may require you to avoid direct alterations to the existing license key.