To add a new admin to your event:
Go to Management -> Manage Users
Select "Add User"
Here you’ll enter the First Name, Last Name, Email Address, and Organization for the admin.
NOTE: the "Add Email" button is to add a SECOND email to the same account
Leave the Status at "Active"
Select "Save"
To send an email to your new Admin, so they can set their password:
From the Manage Users page:
Check the box next to their account
Use the Bulk Actions drop down menu below to select "Send Reset Password Email"