_MobileItem.ReplyRecipientNames Property
Office 2010
Returns a semicolon-delimited String (string in C#) list of display names of reply recipients of the MobileItem object. Read-only.
Assembly: Microsoft.Office.Interop.Outlook (in Microsoft.Office.Interop.Outlook.dll)
This property contains only the display names for the reply recipients. Set the reply recipients list by using the ReplyRecipients property.
For a recipient that does not have a meaningful display name that includes a first name and last name, this property returns the mobile phone number instead.