Hi Gregg Hughes ,

The email notifications has been send based on the admin role . So it's better you should revoke the admin privilege of that particular user.

The notifications can be disable through the following steps,

1. In the Admin Console, go to Security > Administrators.
2. Click the Roles tab.
3. Locate the role you want to configure email notifications for and select Edit > Edit role notifications.
4. Disable the email notifications for the role .
5. Click Save.

But it will affect the entire users who are assigned with the particular role.