Push notifications on shared lists for personal accounts is available in To Do. Push notifications for AAD accounts (work and school accounts) is work in progress and will be enabled soon.
An error occurred while saving the commentDrew commented
Coming from Wunderlist and discovered that unchecking a completed item on a shared list to move it to incomplete does not sync on other shared devices. Super frustrating as my wife and I use this feature all the time on our groceries list. With ToDo you have to manually recreate the item each time in order for it to be shared. Why?