Adding Exchange Contacts to Local Outlook

Question

What I need to do is sync an exchange contacts address book using c# with a local version of outlook.

Any creditentials that need to be used with exchange have to come from the local version of outlook


I have looked into using the Microsoft.Office.Interop.Outlook Namespace and Exchange Web Services (EWS)
http://msdn.microsoft.com/en-us/library/microsoft.office.interop.outlook.aspx

EWS it seems is mostly for interacting with exchange folders rather than contacts.


Does anyone have any ideas on how I can achieve this please?