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?
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.