...
- The event viewer ("Windows Logs\Application") may show a warning.
An attempt to access a protected resource will return a failure (status 500) and the native log output will have the following line:
ERROR Shibboleth.NATIVE [<pid>] native_shib: Shibboleth handler invoked at an unconfigured location.
This indicates that configuration for the ISAPI filter is still active somewhere.
...