In Azendoo, you can choose to either be notified of every new message, or only about conversations that concern you directly. Go to your Personal Settings and to the Notifications tab to choose between the two settings:
Selecting "For every new message in Azendoo" will send you notifications about new conversations and comments on subjects you are a member of, not matter what.
Selecting "Only for conversations I participate in" will send you notifications about new conversations and comments of conversations you either started, commented on, or have been @mentioned on. Other conversations will still show in your activity feed, but you they will not show in your Notification Center.
You can change this setting anytime, so feel free to try both and see which works best for you.