OWA and Integrated authentication

[grabrail]

Can anybody help me sort this one out?

Microsoft OWA running on Small business server 2000 On active directory

When we have the integrated authentication enabled we cant log on to the OWA page.

If we have Basic authentication only enabled we can log on fine.

 

[Campell]

In the examples I've been viewing, it's said that ISA Server only supports the basic authentication mode and you should run over SSL if you want to hide your passwords from the internet.