You must be logged in to a paid Zoom account at zoom.us
Click on Reports on the left side of the page under Profile.
Options for Usage Reports will appear with 2 sections - Usage and Meeting.
Select Usage (view meetings, participants and meeting minutes within a specified time range.)
A list of your Zoom meetings will appear.
FInd the meeting you want.
Click on the number that appears in the Participants column for that meeting.
A popup box titled Meeting Participants with information about the participants will appear - name, user email, join time, leave time, and duration.
It is recommended that before you click Export, you select both options to Export with meeting data and Show unique users.
When you click Export, the worksheet will be created and downloaded.