You try to download a .zip file attachment in Microsoft Outlook Web Access (OWA) from a server that is running Microsoft Internet Security and Acceleration (ISA) Server 2004 Service Pack 2 (SP2). However, you cannot download the .zip file attachment as expected. Additionally, you receive the following error message:
For more information on this problem, check out http://support.microsoft.com/default.aspx?scid=kb;en-us;916573&sd=rss&spid=2108
Thomas W Shinder, M.D.
MVP -- ISA Firewalls