问Nginx反向代理SharePoint网站后网站为什么无法用AD账户登录？

#user  nobody;
worker_processes  1;

#error_log  logs/error.log;
#error_log  logs/error.log  notice;
#error_log  logs/error.log  info;

#pid        logs/nginx.pid;

events {
    worker_connections  1024;
}

http {
    include       mime.types;
    default_type  application/octet-stream;

    #log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
    #                  '$status $body_bytes_sent "$http_referer" '
    #                  '"$http_user_agent" "$http_x_forwarded_for"';

    #access_log  logs/access.log  main;

    sendfile        on;
    #tcp_nopush     on;

    #keepalive_timeout  0;
    keepalive_timeout  65;

    #gzip  on;
    upstream www.bystp.com {
    ip_hash;
    server 192.168.0.11:9000;
    server 192.168.0.12:9000;
    server 192.168.0.13:9000;
    server 192.168.0.14:9000;
    server 192.168.0.15:9000;
  } 
    server {
        listen       80;
        server_name  www.bystp.com 192.168.0.10;

        #charset koi8-r;

        #access_log  logs/host.access.log  main;

        location / {
        proxy_pass http://www.bystp.com;
        proxy_set_header host www.bystp.com;
            root   html;
            index  index.html index.htm;
        }