This image is a FreePBX image without any configuration, you will be presented with the FreePBX's first configuration screen, where you need to define the administrative user. This image is the result of: -downloading the FreePBX ISO from the official website and processed following the guide on the following link https://wiki.freepbx.org/pages/viewpage.action?pageId=191136719; -added the required kernel parameters (as per Azure Guide); -executing the de-provisioning command of the Azure Linux Agent; -nothing else of third party has been added by Com.Tel SpA. You will be able to change (update or downgrade) the Asterisk version by using CLI commands.