Recently I migrate/upgrade our Nginx Load Balancer from version 1.9.5 to 1.9.14 and we were handling Microsoft ADFS traffic through it. After the upgrade to 1.9.14 the Active Sync & Outlook authentication started failing, but the web authentication (OWA) still worked.
It was determined that Nginx was no longer passing the information correctly to the ADFS proxies. We have taken the ADFS traffic out but we are very curious why all of sudden why it stop working.
network topology: World <--> NGINX LB <--> Pair of ADFS Proxies
ADFS 2.0 of server 2008 R2
Nginx 1.9.5 to 1.9.14
SSL communication all the way through, NOT using HTTP2.
Any ideas are welcome. Thanks