"Use Identity Provider's login page" should be checked. Microsoft.IdentityServer.RequestFailedException: MSIS7065: There are no registered protocol handlers on path /adfs/ls/idpinitatedsignon to process the incoming request. If so, can you try to change the index? We need to know more about what is the user doing. It looks like you use HTTP GET to access the token endpoint, but it should be HTTP POST. Added a host (A) for adfs as fs.t1.testdom. All of that is incidental though, as the original AuthNRequests do not include the query-string part, and the RP trust is set up as my original posts. I have tried enabling the ADFS tracing event log but that did not give me any more information, other than an EventID of 87 and the message "Passive pipeline error". User agent string: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36. Indeed, my apologies. March 25, 2022 at 5:07 PM Stack Exchange network consists of 181 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Sunday, April 13, 2014 9:58 AM 0 Sign in to vote Thanks Julian! Proxy server name: AR***03 ADFS Passive Request = "There are no registered protocol handlers", https://technet.microsoft.com/library/hh848633, https://www.experts-exchange.com/questions/28994182/ADFS-Passive-Request-There-are-no-registered-protocol-handlers.html, https://fs.t1.testdom/adfs/ls/idpinitiatedsignon.aspx, fs.t1.testdom/adfs/ls/IdpInitiatedSignon.aspx, The open-source game engine youve been waiting for: Godot (Ep. Authentication requests to the ADFS Servers will succeed. Yes, same error in IE both in normal mode and InPrivate. This configuration is separate on each relying party trust. Notice there is no HTTPS . If you've already registered, sign in. To check, run: Get-adfsrelyingpartytrust name