To eliminate unnecessary notifications and reduce email noise, the Notify Users hidden property has been added to groups.
A group administrator can specify whether a user is notified when the user is added to the group.
The property value is set for each group individually.
| Available Values | Description |
| All | An email notification is sent to an internal or external user when the user is added to a group. |
| Internal user only | An email notification is sent to an internal user when the user is added to a group. |
| None | No email notification is sent to a user when the user is added to a group. |

is this feature enabled? I don't see it anywhere. system setting?