Setup:
Microsoft Windows Server 2003 (IIS6)
...
7) Now customize CasOwa's web.config file with the appropriate URL's:
<appSettings>
<add key="CasOwa.ClearPassUrl" value="https://winserver.xtanki.local:8443/cas/clearPass"/>
<add key="CasOwa.OwaUrl" value="https://winserver.xtanki.local/owa/"/>
<add key="CasOwa.skipOwaUrlCertificateValidation" value="true"/>
</appSettings>
and
<casClientConfigcasServerLoginUrl="https://winserver.xtanki.local:8443/cas/login"
...