Apache的mod_auth_kerb所;用户输入的kerb_authenticate_user（NULL）和auth_type Kerberos;客户没有将他们的凭证委托给我们

I am trying to setup Integrated Windows authentication with kerberos using ActiveDirectory in windows server 2008 and everything works well and I am able to get kerberos tickets on successful login. I am facing problem in forwarding this ticket to server where Apache is configured. When forwading ticket KRB5CCNAME is not set in Apache/PHP environment variables.I am trying to setup Integrated Windows authent