Как настроить HAProxy чтобы для OWA с Form Based Authentication?

frontend HTTP
	mode http
	timeout client 10s
	timeout http-request 10s	
	bind 10.0.0.1:80
		
	# Redirect all HTTP to HTTPS
	redirect scheme https code 301 if !{ ssl_fc }

frontend HTTPS
	bind 10.0.0.1:443 ssl crt /etc/ssl/private/mail.company.com.pem
	mode http
	
	# options
	option http-keep-alive
	no option httpclose
	no option http-server-close
	timeout client 600s
	maxconn 1000
	
	# acl
	acl is_owa_redir path / /owa
	
	acl is_mail hdr(host) -i mail.company.com
	
	# redirect root to owa
	http-request redirect location /owa/ if is_mail is_owa_redir
	
	# backends
	use_backend EXCHANGE if { ssl_fc_sni mail.company.com }
	default_backend EXCHANGE

backend EXCHANGE
	# balance source
	
	# options
	option http-keep-alive
	option prefer-last-server
	option forwardfor
	option httplog
	no option httpclose
	no option http-server-close
	no option forceclose
	no option http-tunnel

	# server cas01 cas01.intranet.company.com:443 ssl verify none check
	# server cas02 cas02.intranet.company.com:443 ssl verify none check
	
    server mail.company.com mail.company.com:443 ssl verify none check