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Kirk Evans shows how to take advantage of SharePoint 2010 Business Connectivity Services (BCS) to develop solutions with deep integration of external data and services. BCS builds upon its BDC predecessor in the key areas of presentation, connectivity, tooling and lifecycle management.
MSDN Magazine December 2009
"The Business Data Connectivity Metadata Store is currently unavailable."
checked in ULS Logger, the actual error is "SharePoint Foundation Claims Authentication 8305 Critical An exception occurred when trying to establish endpoint for context: The 'CustomBinding'.'http://tempuri.org/' binding for the 'IWSTrustChannelContract'.'http://tempuri.org/'
contract is configured with an authentication mode that requires transport level integrity and confidentiality. However the transport cannot provide integrity and confidentiality.. 5d0b275a-dfa8-4834-ba5a-d8ed7d58abd1"
googled it, found some fix:
1. install the hotfix
2. simply checking the services are running
3. checking for necessary security permissions on the
BDC Service Application
using the 'disableloop