Returns or sets a Boolean (bool in C#) value that specifies whether the contact items folder will be displayed as an address list in the Outlook Address Book. Read/write.
Assembly: Microsoft.Office.Interop.Outlook (in Microsoft.Office.Interop.Outlook.dll)
If you set the ShowAsOutlookAB property of a contact items folder to False, it will not be available in the drop-down list under Address Book in the Address Book dialog box.
ShowAsOutlookAB does not support folders on another Exchange user's mailbox, for example, a Contacts folder that is shared by another user. Getting or setting this property on such a folder will not produce any desired results.