Switching Users
The Login As… 
button allows a System Administrator or the Root User to switch to another user account for troubleshooting purposes. This may then allow you to reproduce a problem in the system that has been reported by a specific user. Please note that a System Administrator cannot switch to another System Administrator. In order to do this you need to be logged in as the Root User.
To log in as a different user, click the Login As…, located in the toolbar in the top right hand corner of the screen. Additional fields will appear, as shown in the figure below.
The Login As... field in the toolbar
Enter the username of the user that you want to login as and click Login. The Administration Interface will be refreshed and you will be logged in as that user.
The Logout Icon in the toolbar is changed to indicate that you are logged in as another user, as show in the figure below.
The Logout Icon
To revert back to your user account, click the Logout Icon.