ADFS Proxy Replacement on F5 BIG-IP

Hi Graham, we also are having Marvin's issue both with RC8 via Official Deployment instructions and Manual implementation via this article (https://support.f5.com/kb/en-us/products/big-ip_apm/manuals/product/apm-third-party-integration-13-1-0/12.html). We are on 13.1.1. We validated communication is occurring between the VIP and ADFS server, but still fails to establish trust. Validated no drops on firewall. We also went through Microsoft's Analyzer tool to validate our ADFS configuration. All pass. https://docs.microsoft.com/en-us/windows-server/identity/ad-fs/troubleshooting/ad-fs-diagnostics-analyzer

Are there any other troubleshooting steps you can provide? Are there any non-OOB configuration steps taken on the ADFS server itself?