In the meantime, one feature from the new app has been backported: To Do integration.

The new Outlook for Windows that Microsoft is still testing also has a dedicated To Do button.

At least for the moment, older Outlook tasks will live alongside the To Do page.

Animation of creating a To Do in Outlook

Microsoft

There’s no word on when, or if, To Do integration will arrive in Outlook for Mac.

There is astandalone To Do app for macOS, though.

Source:Microsoft Blog,Microsoft Support