To edit a users details on the site navigate to the “Site Users” item by clicking on “User Management” on the header bar and then “Site Users” on the subsequent bar that appears.
You will be presented with a screen, a sample of which is below, showing all the users currently configured on the site.

Find the user that you wish to edit and click the “Edit” link on the right hand side of the item line. Please note that the list can be filtered using the drop down boxes at the top of the screen if a large quantity of users have been set up on the site.
When you click “Edit” you will be given a user properties screen populated with the details of the user you selected.

Edit the details that you require changed and when completed click “Save Details” to update the user.