Sharing Windows Authentication between SharePoint and ASP.Net Web Application

Question

We have a SharePoint web application that uses Windows Authentication eg extranet.test.com.

We also have an ASP.NET web application that uses Windows Authentication eg webapp.test.com

However when navigating between the two applications, users must authenticate a second time. Is there a way to prevent this?

I have searched the web but have been unable to find a suitable answer. I have seen many examples using Forms Based Authentication but this is not a viable option since we are using the Active Directory.

Thanks in advance.

Answer 1

What is the authentication scheme you are using: NTLM / Kerberos ?

1. If you are using Kerberos, you can simply enable credential delegation between two applications.

2. If you are using NTLM, the only solution is to put them in Intranet zone. You can enforce it using Domain policy. Not that this will work only if the users are logged on to domain.