Go through the ‘Add STS Reference’ process. 1. Service Certificate Location Make sure you remove the defaults that the ASP.NET MVC 3 project put into your web.config on the <certificateReference> element. StoreLocation and StoreName must be removed. Otherwise you get the following error. Your <serviceCertificate> element (full path is “/microsoft.identityModel/service”) should be changed from this: … Continue reading ADFS Setup Troubleshooting