Each individual can only change their own email. There is no separate email for admin functions.
The user email is changed by clicking on "Update Profile" in the upper right hand corner when you're logged in as a user (blue screen).
Have you searched the
Help Center? Try doing a Google search and adding "site:churchofjesuschrist.org/help" to the search criteria.
So we can better help you, please edit your
Profile to include your general location.