You can schedule tasks through Web-Based Email's calendar by using the Quick Add feature.
To Schedule a Task Using the Quick Add Feature
Click the Calendar button.
In the Quick Add box, select Task and type the subject of the task.
To specify a due date, from the Due Date list, select a date.
To set a priority for the task, from the Priority list, select a priority level.
To notify someone of a task or assign the task to another person, in the Notify/Assign field, type the name of the person.
Click Add Task.