Subscribe other users to email notifications
You must be a system, organization, or project administrator to subscribe others to all items at a project level.
To subscribe others to a single item, select the item in Single Item View, then select Subscribe > Subscribe others.
To subscribe others to multiple items:
Open the items in Projects > List View.
Select each item you want to subscribe to.
Select Subscribe > Subscribe others.
In the Subscribe others to all items window, select the groups or users that you want to subscribe to this item.
Select OK.