Brett Lonsdale's SharePoint Blog

Business Connectivity Services is the new SharePoint 2010 replacement for the Business Data Catalog (BDC) which was introduced with Microsoft Office SharePoint Server 2007 Enterprise. Business Connectivity Services provides many improvements over the BDC including the ability to write back to the data source, offline capabilities through the office suite such as SharePoint Workspace, improved tooling and additional features such as External Lists. Our site provides several articles introducing the BCS which can be found here:

Business Connectivity Services Introduction 

Within this article we are going to explore how Business Connectivity Services Authentication works and how to configure it successfully, some of the issues that you will face and how to overcome or work around them.

Read more: http://www.lightningtools.com/blog/archive/2010/01/11/business-connectivity-services-authentication.aspx