The notification 'Interview Calendar File For Candidates' when is this triggered?

Summary: When an interview is scheduled, Candidate and Interviewer receives the notification that the interview is scheduled which does have a link at the bottom of the notification to download the .ics calendar attachment. However, the notification 'Interview Calendar File For Candidates' is not received. Attached is a screenshot of the default version is already active in the instance.

Has anyone been able to receive a notification for Interview Calendar File For Candidates and when does this trigger?