Not for sure if this is the right area to be asking this but here goes. I am looking for a way to allow a single sign-on to Windows 2003 domain and have it communicate with a Novell Groupwise server for e-mail and a Sun Solaris box for custom application. This way the user only needs to sign on once and be able to access all of these applications without having to go through numerous password boxes. I have been looking at LDAP and other services. Does anyone have any experience with implementing this at their organization. Thanks for any answers you can provide.