After you have your tasks added to Outlook, you can set reminders on them with due dates. Please see the steps below:
Step 1: Click the "File" tab from the Ribbon;
Step 2: Click "Options" from the left navigation pane;
Step 3: Click "Tasks" from the "Outlook Options" window;
Step 4: Check the box of "Set reminders on task with due dates", and select a time to remind from the drop-down list (or type a time);
Step 5: Click "OK" at the bottom to close the Outlook Options window.
If you only want to change one task's due dates, please follow the steps below:
Step 1: Click "Tasks" button from taskbar;
Step 2: Double click the task to open it;
Step 3: Check the "Reminder" box, then select a reminder time;
Step 4: Click "Save & Close" (or Ctrl+S) to have the changes.
