ACS50001: Relying party with identifier was not found.

Hi,

I set up Azure ACS that uses ADFS for single sign on based on the article from Ben Morris below.

http://www.ben-morris.com/set-up-a-federated-identity-provider-on-azure-using-active-directory-and-adfs-2-0/

When I try to run my MVC application, it gives the following error. Any help will be highly appreciated.

An error occurred while processing your request.
HTTP Error Code:  400 
Message:  ACS20000: An error occurred while processing a WS-Federation sign-in request. 
Inner Message:  ACS50001: Relying party with identifier 'https://tftestacs.accesscontrol.windows.net/' was not found. 

Regards,

Vinod.