I am trying to add a new relying party trust using ADFS 3.0. Everytime I add the metadata url I get "An entry with the same key already exists". I've tried using powershell and get the same result. I have looked in the event viewer as well as enabled ADFS tracing and am getting no errors I can use to troubleshoot. Is there a different log somewhere that would lead me to what is wrong? I am suspecting the xml file could be at fault, but this 3rd party has others using this metadata url with no issues. I would rather not post their XML file if possible. They are looking into the issue as well I just wanted to know if there was a another spot I could look for logs. Thanks a lot.