To view/edit Primary and CC Emails for a user:
1) Navigate to Core > People Finder.
2) Search/select the user.
3) Click Contact Card.
4) Under Digital, you can view/edit a user's Primary and CC Email address.

This can also be done through a user's Core profile.
1) Navigate to Core > Users/Access > Profile > Edit User Profile Data.
2) Search/select the user.
3) Scroll down to Internet Information, and you can view/edit email fields here.