Unable to Retrieve Email Address For Meeting Participant Even if on Calendar Invitation

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I am trying to retrieve the email address of participants in a past meeting using the following endpoint
https://api.zoom.us/v2/past_meetings/{meetingUUId}

I am aware of the rules zoom has regarding displaying email addresses. I am unable to have the participants register or to provide them as an authentication exception because all meetings happen in a personal meeting room.

The participants are on a calendar invitation and have accepted, which I believe should fulfil the zoom email address display requirement of “If the participant is on the calendar invitation or event using one of Zoom’s calendar integrations (Outlook or Google Calendar).”

I’m not sure what I’m missing visa vie the calendar invitation to allow zoom to display the participant’s email address.

Thank you!