eService User Login

Mar 5, 2010 at 5:13 AM

We already have a custom portal where users login currently and we would like to integrate that with eService portal. The users will login to custom portal first and then click on a link to get to eService. But we don't want the users to enter their login information twice. If the login and password are same for both custom portal and eService portal, can this be done. If so, can someone please direct me. Thanks