Click on the Memberlist button. As an Admin you can see all emails. But they just come up as buttons. You need to click the email button on each member, to get the adress.
You can also go to the Admin Panel >> User Admin >> Management, type/paste in the member's name, click Look up user, and see the email on the member's profile page.
If you by any chance want this to be able to send emails to all members, then there is a Mass Email function in the Admin Panel >> General Admin >> Mass Email. It sends the email to all members on the forum, and you can also send to certain groups, like to the Moderators only, for example.
FoxLeonard