Hyphen in URL
The original URL has hyphens inside: sel-example.com/test/ After the traffic gets intercepted by Siteminder, it will alter the URL and encode it with an extra hyphen sel--example.com/test after successful authentication. I've removed the variables from BadCssChars, BadQueryChars, BadUrlChars. But it is still facing this error.
Are the any other variables under ACO I should be aware of?
The additional hypen is expected (by design) with LegacyEncoding=no, it is just a matter how it is handled.In your use case, Webagent is the one adding the additional hyphen to the host name but if this is left to the Webagent to decode,it will remove both -SM- and the additional hyphen within the hostname.Are you using a custom login page ? Do you have the same using the default login.fcc ?If you are using custom coding to manually decode the TARGET value and missed out on the extra hyphen.To resolve this, add additional logic to remove the additional hyphen within the hostname.
Hope it helps,