1.- Browse and select the OU.
2.- Once the user list populates, click on the hamburger button next to the filter bar, and select "choose columns". Ensure only Name and Secondary Owners is selected:
3.- The user list should now show a list of users and their secondary owners in separate columns. Click the hamburger button again and select "save to file" to export the list as a CSV.
Alternatively, you can use Powershell:
Select-Object -Property Name,@{Name="edsvaSecondaryOwners";Expression={[string]::join(";",($_.edsvaSecondaryOwners))}} | Export-CSV -Path c:\temp\UserExport2.csv -NoTypeInformation
NOTES
1.- The Name / Expression allows you to take a returned property and do some transformation on it (described below)
2.- The string/join takes the ...SecondaryOwners list and converts it to a string delimited by semi-colons.
3.- The "-notypeinformation" gets rid of the message at the top of your output file.