The Tasks app can be synchronized with your MS Exchange account. You can create and manage your tasks using your phone or from MS Outlook or MS Office Outlook Web Access.
From the Home screen, tap Apps > the Apps tab (if necessary) > the Tasks icon .
Tap the Add task icon (in the upper-right corner of the screen).
Enter the Subject, Due date, Description, Repeat, and Reminder, as necessary.
Tap Save (at the bottom of the screen).