If your organization uses directory synchronization, the delete option is not available in Control Hub, and you must delete user accounts from your Active Directory. Then, the Cisco Directory Connector updates your organizations user list when it synchronizes the user account information.
From the customer view in https://admin.webex.com, go to Users, click the more button, and then click Delete User.
The user can no longer sign in to your Webex site, all their assigned Webex services are removed, and they are removed from any spaces or teams that they were participating in. Any content that they created in spaces is not deleted, and the content is subject to the retention policy that each space owner has implemented.