All Internet and intranet sites are assigned to the Internet zone by default. If you trust an Internet or intranet site and ...

All Internet and intranet sites are assigned to the Internet zone by default. If you trust an Internet or intranet site and need it to be functional, add the Internet site to the Trusted sites zone, and add the intranet site to the Local intranet zone. For more information about the security levels for each zone, see Effects  of Internet Explorer Enhanced Security Configuration.