OAB download works fine from any 2003 client showing the OAB is fine & public folder distribution is working.
From Outlook 2007 clients, the OAB will not download, just hang indefinitely.
I am able to browse to OAB URL fine, enter credentials, and view the OAB.
IIS logs show error 500 (internal server error) when Outlook tries to access OAB. New profiles do not resolve the issue..