AD FS Troubleshooting - Idp-Initiated Sign On | Microsoft Docs
https://docs.microsoft.com/en-us/windows-server/identity/ad-fs/troubleshooting/ad-fs-tshoot-initiatedsignon
Sep 20, 2021 · The AD FS sign-on page cannot be used to initiate a sign-on with a claims provider trust that is configured with a WS-Federation passive endpoint only. Register a relying party such as ClaimsXRay to verify that a WS-Federation claims provider trust works as intended. Next Steps. AD FS Troubleshooting
DA: 1 PA: 11 MOZ Rank: 53