Task Forms Overview
You cannot customize the default pages of a task form by using Microsoft Office Outlook form pages. However, you can hide these pages and create new pages on the form if you choose.
By using form regions, you can customize the default pages of a form by adding an adjoining form region. Learn more about form regions.
When tasks are used in a personal folder, you can assign tasks to other people. However, when task items are placed in a Microsoft Exchange public folder, they cannot be assigned. Instead, the Owner field can be modified to reflect who currently owns the task. It is recommended that you create a custom view so that the tasks are grouped by their owner.