TaskItem.DelegationState (Outlook)
Returns an OlTaskDelegationState constant indicating the delegation state of the task. Possible return values are olTaskDelegationAccepted - The delegate accepted the task, olTaskDelegationDeclined - The delegate declined the task, olTaskDelegationUnknown - The delegate response to the task is unknown, olTaskNotDelegated - The task has not been delegated.
Dim otdDelegationState As OlTaskDelegationState
otdDelegationState = Session.CreateSharingItem.Move.Items(1).DelegationState