Right, so I built 2 identical Exchange 2003 servers recently, both running on Win2k3 R2 and have the latest service packs and updates.
One of the servers stopped responding to OWA requests but only when users connect via Internet Explorer. Firefox works without any problems.
Both servers have identical configurations (i.e. absolutely standard) but one works with any browser and one doesnt.
I've read through all the related EE problems I can find a solution to this problem. I have tried messing about with the authentication etc with no results