I have Identity server 4 which reside behind ngnix proxy. and it support Azure AD. now if I SSO on https then it is not working for IE browser but work properly in other browser due to IWA/NTLM/Kerberos .
So change need to do in ngnix to support that.
we have default setting in nginx like this :
listen 443 ssl http2 default_server;
listen [::]:443 ssl http2 default_server;
Then I have removed http2
listen 443 ssl default_server;
listen [::]:443 ssl default_server;
so IE has issue with SSL + http2