I've published my OWA Server through ISA Server and its working. However, OWA log in is very slow. Is there a way to speed this up??
Yes -- there seems to be some issues with using integrated authentication through the ISA Server for OWA log in. We recommend that you use Basic Authentication and SSL for your OWA site. The SSL link will protect the free text username and password from being detected by intruders that may be sniffing the line.