I am looking at integrating Sharepoint into Exchange 2007 and one thing I have run into is it won't pass the auth directly through and only brings up the form. Is there a way to run both forms based and integrated authentication to the same OWA/Exchange. For a little background, I have a sharepoint site set up at a location outside of my local domain and set up a trust between the two so authentication works just fine. When I add in the web parts for inbox and for calendar it brings up the form for authentication as opposed to integrated authentication. The biggest problem is the majority of users we have are remote users and not part of the local domain so they primarily do everything via web base. Ryan

Yes you accomplish this by creating an additional OWA vdir under a new IIS Web Site on the CAS, and then enable integrated auth on the newweb site. Note that the vdir must be created under a new web site.