TaskRequestItem Object (Outlook)
Represents a change to the recipient's Tasks list initiated by another party or as a result of a group tasking.
Unlike other Microsoft Outlook objects, you cannot create this object. When the sender applies the Assign and Send methods to a TaskItem object to assign (delegate) the associated task to another user, the TaskRequestItem object is created when the item is received in the recipient's Inbox.
Use the GetAssociatedTask method to return the TaskItem object, and work directly with the TaskItem object to respond to the request.
The following Visual Basic for Applications (VBA) example creates a simple task, assigns it to another user, and sends it. When the task request arrives in the recipient's Inbox, it is received as a TaskRequestItem.