-Install FreePBX on New Server
-Run a full backup on current server
-Deactivate the license on the current server – https://portal.sangoma.com/deployments
-Activate new server via SSH – fwconsole sysadmin activate deployementID
-Run a restore on the new server using the backup file from step above
-Change External Address from Settings > SIP Settings to new IP Address
-Update Firewall settings with new IP Address