Question : OWA problem User is asked for credential for every message (IE 8)

OWA problem with IE 8
User is asked for credential every time he clicks to open the email.
We use Exchange 2003 SP2

Answer : OWA problem User is asked for credential for every message (IE 8)

I have a guide here on publishing OWA with ISA 2006 (there are a few updates pending but it should be sufficient): http://demazter.wordpress.com/publish-exchange-services-with-isa2006/