Hello folks,
If you are receiving the error message “Outlook Integration Error” when you are outside of your network and you are also using ISA 2006, the following post http://blogs.technet.com/isablog/archive/2009/04/01/ocs.aspx can be useful to you. It was blogged by ISA Team and explains in detail the cause and a resolution for that issue.
Cheers,
Anderson Patricio