Account owner/administrators can resend confirmation emails from Members → Send Reset/Confirmation email (against the staff user).
This will let the user reset their password as well.
Administrators can also head to the respective Member Details page and click on ‘Send Password Reset Email’.
Send a password reset email to yourself irrespective of your user level
Confirmation emails for an unconfirmed member’s account can be resent by going to the Login page and following the process for “Forgot your password?”.
Entering a member’s email address will resend a confirmation email to the member’s inbox. If the problem persists, please double-check your Spam folder.