We must redirect the pages of a site on the pages of another site by changing the main address of the site and keeping the relative addresses of the pages the same. So :
http://blog.mecdata.it/default.aspx will be redirect in https://www.mecdata.it/default.aspx
On our server we need to install an additional IIS module: “HTTP Redirection“.
in IIS, in your site (in this example blog.mecdata.it) select Http Redirection module and compile it in this way
this configuration will create a web.config file in your site root :
<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<system.webServer>
<httpRedirect enabled="true" destination="https://www.mecdata.it" exactDestination="false" childOnly="false" />
</system.webServer>
</configuration>
That’all
more information : https://manage.accuwebhosting.com/knowledgebase/988/How-to-set-website-redirection-from-IIS-7.html