Hi Jan, Closest thing you can use here are the tasks which you can set to Outlook.

The reminders should popup on the mobile phones we use in our familiy: Android and Iphone or be sent by mail when due. Specifically, Microsoft To Do doesn't currently support the start and end dates, task status, task completion percentage, multiple priority levels, task work hours, task colors, or categories that are available in Outlook Tasks. Hi, Im looking for a way to set reminder within OneNote 2013. While data you enter in additional details in Outlook Tasks will be stored safely on the servers, it won't be displayed in To Do. Microsoft To Do doesn’t yet support all the varied features of Outlook Tasks. All tasks are stored on Exchange Online servers, so they'll be shown in both Microsoft To Do and Outlook Tasks automatically. To view your To Do tasks on your Outlook Desktop client or on, use the same Microsoft account to sign in to both Microsoft To Do and Outlook.

One of Microsoft To Do’s features is an integration with Outlook Tasks. Since your tasks are stored on Exchange Online servers, they'll also sync automatically to your Outlook Tasks.

Onenote todolist