Hi,
Quick question to all other Hosted Exchange providers, and I wondering about that can't find any solutions for it. Looks like that we have this problem only?! 
We're providing Hosted Exchange andSharePoint, but I'm not really convinced about the integration of WSS 3.0 in Outlook 2007 for hosted external users.
If our users try to integrate a SharePoint component (e.g. calendar) they needs to enter there SharePoint credentials again. No single sign on between Outlook 2007 and WSS!?
Microsoft with BPOS fixed this issue by providing a single sign on application to the users.
How the other hosting providers fixed the re-authentication problem between Outlook and WSS?
Thank you
Tobias