expression.ContactNames
expression Required. An expression that returns a JournalItem or TaskItem object.
Remarks
If a program tries to reference any type of recipient information by using the Outlook object model, a dialog box is displayed that asks you to confirm access to this information. You can allow access to the Address Book or recipient information for up to ten minutes after you receive the dialog box. This allows features, such as mobile device synchronization, to be completed.
You receive the confirmation dialog box when a solution tries to programmatically access the ContactNames property.