I have the following setup- we use an external, third-party load balancer to forward traffic to one of our two ADFS Proxies (in the DMZ) which in turn forward to one of our two ADFS servers. Internally, SSO works if we point directly to the ADFS servers, but we get a secondary signon box when pointing at either the load balancer or the ADFS proxies. Signing in will work, but we're beating our heads against the wall trying to figure out why we're running into this.
Certs all seem to be fine. I'm out of ideas on what we would need to look at. Any suggestions? Thanks in advance.
The ADFS and ADFS Proxies are all Windows Server 2012 R2, fully patched.