Yes.
From the xCenta Essentials Dashboard, click on your Name and Location. A drop down list will load, select 'Location Admin'.
A new screen will appear. Select your location from the drop down.
Click on your selected location. A new page will appear. Click on 'Manage Users'.
A new page will appear. Click on 'Select a user at this location', a drop down list will appear, select the name of the user who's email needs editing.
A new page will appear. Click 'Update' to change the email address registered to that user.
A pop up will then appear. Fill in the user's updated emailed address and click 'Save'.
If you are unable to follow these instructions, you may not have the required user permissions. Please contact your Site Administrator.