To Do inside Outlook Calendar is not syncronizing

Hi!

I usually use "To Do" inside Outlook Calendar.

But My Tasks inside this session are not synchronizing with my To Do App.

This way, I'm not able to Remove/Edit/Create any task on this list.

I always keep with the same 3 Tasks regardless of my actions.

Anyone knows how I can fix this issue and use To Do inside Outlook Calendar?

Thank you all!
Jonataspa