refer owa(exchange) 2013 via a iframe in sharepoint 2013

hb120973135

　　Refused to display 'https://cas.temp.local/owa/' in a frame because it set 'X-Frame-Options' to 'SAMEORIGIN'.
　　
　　create a file named a.cs under C:\Program Files\Microsoft\Exchange Server\V15\FrontEnd\HttpProxy\owa\app_code



using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Security;
using System.Security.Principal;
namespace ZY
{
public class M1 : IHttpModule
{
public void Dispose()
{
}
public void Init(HttpApplication application)
{
application.PreSendRequestHeaders += new EventHandler(application_PreSendRequestHeaders);
}

void application_PreSendRequestHeaders(object sender, EventArgs e)
{
HttpApplication application = (HttpApplication)sender;
application.Context.Response.Headers.Set("X-Frame-Options","");
application.Context.Response.Headers.Remove("X-Frame-Options");
}


}
}
　　
　　add a line to web.config(C:\Program Files\Microsoft\Exchange Server\V15\FrontEnd\HttpProxy\owa)
　　between
　　<system.webServer>
      <serverRuntime uploadReadAheadSize="0" />
      <modules>



<add name="zy" type="ZY.M1" />
　　</modules>
　　
　　close web browser ,clear cache and cookies
　　
　　The OWA 2013 now can display with a iframe under a differetn subdomain