I ran into a real head scratcher this week. While migrating a very public folder dependant organization, I couldn’t access public folders through OWA. I had full public folder functionality in the Outlook client, only OWA was affected. The environment was still in a hybrid state with production Exchange 2003 servers in the organization as well as DR servers which were using a third party replication package. The exact error I was getting looked like this: I had already established all 2010 and 2003 ......