Hi @lbranen-ahumada,

Assuming you're using the "assign to" boxes, and adding a new box for the single student while then leaving the "everyone else" with the original date, the only student that should get notified would be the single student whose date changed.  Since the date remained the same for the other students, they would not get notifications.  If you are just changing the global due date for everyone though, all students would then get a notification.

Hope this helps!

-Chris