assigned tasks not showing in outlook 2013

I am testing the Task functionality in Outlook.com and comparing it to Exchange Server task functionality.  I am using Outlook 2013 to access my Outlook.com account.  When I create a task in Outlook 2013 and assign the task to another OUTLOOK.COM user here is what happens:

1.  They log into their Outlook.com account via web browser - the assigned tasks shows up in their inbox.

2.  They log into their Outlook.com account via Outlook 2013 desktop app - the assigned tasks DOES NOT show up in their inbox?

My Questions:

1.  Why does it not show up when accessing via Outlook 2013 desktop app?

2.  How do you properly assign a tasks using the Outlook.com platform (web browser and Outlook 2013)?