- Log in as root to your 3CX server
- cd to /var/3cxpbx/Instance1/Bin
- Run the following command
sudo -u phonesystem /usr/sbin/3CXBackupCmd --file=/var/lib/3cxpbx/Instance1/Data/Backups/backup.zip
- cd to /var/lib/3cxpbx/Instance1/Data/Backups/ and unzip backup.zip
- In the XML file, locate WEBSERVERPASS