Just in the process of upgrading our firewall from ISA Server 2004 to ISA Server 2006. Before I did this, though, I wanted to grab an export of my current config. However toward the end of the export, the management console would report this error:

0xc0040357
The Server referenced by Array CLAFW does not exist.

After a bit of searching, I found this page by John Howard (jeez our Prime Minister is a busy boy 😉 ) that details the issue. In my case it was the exact same issue, I removed the offending report job from the ISA Server Management Console and my export worked fine.