Use a trusted certificate authority when requesting an SSL certificate.
To view the list of certificate authorities in Internet Explorer
Open Internet Explorer.
Select Tools > Internet Options.
Switch to the Content tab.
Under Certificates, click Certificates.
Switch to the Trusted Root Certification Authorities tab.
The list of certificate authorities recognized by Internet Explorer is displayed.
 | Tip: Trusted certificate authorities include Verisign http://www.verisign.com, Thawte http://www.thawte.com, Entrust http://www.entrust.com, Comodo http://www.comodogroup.com, and Globalsign http://www.globalsign.com. These certificate authorities are already trusted by Internet Explorer. If using your own certificate authority, on each Client, ensure that Internet Explorer is configured as follows: the Check for publisher's certificate revocation option is selected and the Check for server certificate revocation option is cleared. |