Subscribing to tasks
You’re automatically subscribed to tasks that are assigned to you and that you've created, but you can choose to subscribe and unsubscribe from tasks that are assigned to teammates. Subscribing ensures you receive notifications on all task activity.
Subscribing and unsubscribing is as simple as clicking the subscribe button in your task pane menubar. A grey signal means you’re unsubscribed from a task and a blue signal means you’re subscribed.