Directly recording calls from the iAdvize administration is not possible.
Here is the procedure to follow to record them:
Go to Reporting/Conversations (1 and 2) and search for the call using its reference (3), then click on the playback button (4). Finally, open the browser console and select "Network" (5), check the funnel (red arrow), then choose the "Media" filter (6), and you will have the link to the file for download (7).