To begin, you must have a configured integration in Daxium-Air. It can consist of integration to OneDrive, Dropbox, or to an FTP. This will allow you to have a dedicated space to store tasks so that you can automatically import them into your calendar.
You must then configure an "iCalendar" type export. In the settings of this export, you can, among other things, choose the tasks of which users you want to synchronize.
Then just go to your chosen integration tool and extract the return file URL (.ics).You can then include this URL in your calendar.
For example in Apple Calendar, you have to choose "File> Calendar subscription", then paste the URL of your .ics file. This will add your Daxium tasks as a calendar in this tool. This calendar will then be updated for each planned export, as configured in Daxium-Air.