Single Sign on in sharepoint 2010

Question

I have a application in sharepoint 2010. Also There is an intranet application for my company which is not sharepoint. I want something like , when the user enters our companies intranet application and click on the Sharepoint 2010 link.The user shouldnot be able to enter his/her credentials again. How can this be accompanished?

Answer 1

If you're using active directory and normal Windows authentication, it's quite simple. Configure the sites as local intranet sites in Internet Explorer and users will be automatically logged on.

If not; you should specify what it is you're using as authentication mechanisms.