You can determine if hosts can send out email reminders for upcoming Webex Meetings, Webex Training sessions, or Webex Events that are scheduled on a Webex site. Email reminders are enabled by default, but you can turn this off.
From the customer view in https://admin.webex.com, go to Services, and under Meeting, select Sites.
Select the Webex site to change the settings for, and click Configure Site.
Under Common Settings, select Site Options.
Scroll to Schedule Meeting Options, and under Meeting email reminders, select Off.