1. Download here   the Excel file: Co-Host upload > fill out all the details.  
    Note: Yellow marked fields are mandatory.

2.  Upload the file in Attendees > import from Excel.  Check & Match all the columns with the tool and click complete import.  

3. Check the session in 'Preview' (right top of page, attendee view)  and see if co-host has an orange circle and is mentioned as co-host in the session description.

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