In Internet Explorer, click Tools, and then click Internet Options.
On the Security tab, click Local intranet, and then click Sites.
Click Advanced, and then type .domain.com, or an IP address range (for example, 157.54.100-200.) in the Add this Web site to the zone box, where domain.com is your company and top-level domain names.
Click Add, click OK, click OK, and then click OK again to close the Internet Options dialog box.
Restart the computer.
Regards,
Peter