Richard,

>I am creating an App which will navigate to the Public Folders collection on our Exchange server, however I cannot navigate to the Public Folders collection through Code.

Try this, which works with my Outlook 98 installation against Exchange Server:

ol=createobject("outlook.application")
ons=ol.getnamespace("MAPI")

* set references to public folders
oAllPub=ons.folders("Public Folders").folders("All Public Folders")
oYourFolder=oAllPub.folders("Your Folder Name")
oAnotherFolderInsideThatOne=oYourFolder.folders("Another Folder")