Hello,To change the FQDN you would need to stop the hosted instance, then disconnect (release) the FQDN, and redeploy the instance.
You will not be able to use the backup as this contains the old FQDN in it. You can export your users and then reimport them after the PBX is installed.
Everything else (Queues, ring Groups etc) will need to be recreated.
Is this the partner portal? Need to do it from the Customer Portal.
Your customer has a login for his account, you need to use this account.yes the Partner Portal
But how if the 3CX is hosted by 3CX itself ?
Founded in 2005, when VoIP was an emerging technology, 3CX has gone on to establish itself as a global leader in business communications.