Issues when upgrading from ISA Server 2004 to ISA Server 2006

Last night I did an upgrade og Microsoft ISA Server 2004 to Microsoft ISA Server 2006. After the upgrade was completed and the server was rebooted, I had to issues:

  1. Error Code: 403 Forbidden. ISA Server is configured to block HTTP requests that require authentication. (12250) – for all the websites I had published using web-listeners and server publishing rules.
  2. Outlook Web Access not working using OWA Forms Based Authentication

To resolve issue number 1:

Use this knowledgebase from Microsoft: http://support.microsoft.com/kb/924374. I had to use Method 2, since I don’t have SSL certificates for each site.

To resolve issue number 2:

Find the publishing rules used to publish Exchange Outlook Web Access, go to Properties -> Application Settings – and these settings worked for me:

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together with:

Authentication delegation:

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