MailItem.TaskCompletedDate Property (Outlook)
Returns or sets a Date value that represents the completion date of the task for this MailItem. Read/write.
Version Information
Version Added: Outlook 2007
Syntax
expression .TaskCompletedDate
expression An expression that returns a MailItem object.
Remarks
This property returns Null (Nothing in Visual Basic) if the IsMarkedAsTask property is set to False.