The person who is leaving - the "transferer" logs into Zoom Settings Schedule Privilege and assigns schedule privilege to the transferee. The transferee then logs into Zoom, goes to Meetings, then uses the dropdown next to Schedule Meeting button to select the transferer's name.  This will reveal the transferer's meetings.  Select to edits a meeting or series, then use the dropdown at top to select "myself", then Save.  This transfers ownership to the transferee.