When a customer portal user updates the status, adds a file or note, or marks an item as impacted in a WarRoom, are email notifications automatically sent to other users on the portal?

No, email notifications are not automatically sent to other users when a customer portal user makes changes in the WarRoom, such as updating the status, adding a file or note, or marking an item as impacted.

Currently, there is no feature in place that triggers notifications for these actions.