Stop or Turn Off Email Notifications
Anyone who receives an email from GroupVitals has a way to adjust their email notification preferences on their own.
If they have ever received an email from GroupVitals, then they can open up any of those emails and at the very bottom is a link labeled "Change my notification settings" which will take them to their notification settings pages (no login required). There, they can toggle of or on any notifications they don't want.
If someone has an account, then they can login and in the top-right nav, click on the user icon and in the drop-down click on My Notifications which will take them to their notification settings page.
Unfortunately, there's no way for an admin or staff to turn on/off notifications on behalf of someone else.