http://blogs.msdn.com/david.wang/archive/2008/06/02/howto-change-iis-user-impersonation-token.aspxQuestion: Hi, We are using our third party component for doing authentication and authorization with IIS6 web server on win2k3 X64 EE. Here we are using IMPERSONATION concept for this integration. Can anybody describe the required configuration whichen-USCommunityServer 2.1 SP1 (Build: 61025.2)http://blogs.msdn.com/david.wang/archive/2008/06/02/howto-change-iis-user-impersonation-token.aspx#8586837Mon, 09 Jun 2008 21:17:57 GMT91d46819-8472-40ad-a661-2c78acb4018c:8586837Matt<p>I have gone the ISAPI Extension route with HSE_REQ_EXEC_URL. &nbsp;If I use the LogonUser function with a username and password all works well. &nbsp;If I try and use an impersonated token (no password) via Kerberos LSALogonUser and the KERB_S4U_LOGON flag then IIS fails to use the impersonated token. &nbsp;The KERB_S4U_LOGON works in ASP.Net using an HTTP Handler with the new integrated pipeline in IIS7, but I can't get it to work via an ISAPI extention in classic mode or on IIS6. &nbsp;</p> <p>Is KERB_S4U_LOGON &nbsp;not supported on IIS6/IIS7 Classic mode?</p> <p>Thanks,</p> <p>matt</p>