Quarantine users that were created manually with "notification messages for created accounts" enabled in the email quarantine portal only, are not receiving summary notifications.
Symantec Email Security.cloud
Symantec.cloud Managment Portal
Email Quarantine Portal
When a quarantine administrator creates a quarantine user account manually with "notification messages for created accounts" enabled in the quarantine portal only. The users will not receive the notification unless the users have been given the access to "override the default notification setting" within the Symantec.cloud Management Portal.
The Email Quarantine Users can override notification defaults setting determines whether users can override the default notification setting. If the setting is enabled, users are given notification options in their Email Quarantine accounts.
To permit users to override default notification settings