ISA and OWA problem(s)

I had a customer who was having a problem with a ISA published Exchange 2003 OWA. Phe problem had two symptoms:

1. When they clicked on an URL in a mail in OWA they where redirected to a login page.

2. When the create a new message and attach a file they get redirected to a login page.

Turns out this was tho separate problems:

URL problem:

This is a problem with authentication settings in IIS

Attachment problem:

This is a problem with the delegation to the backend Server. This is a known bug in ISA 2007. There is a hotfix but you have to call PSS to get it.

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