Removing a Certificate (Windows SharePoint Services 2.0)
If there is a certificate bound to the Web site and you do not want SSL enabled on the Web site (HTTPS to HTTP) then you must unbind the Web site certificate.
Unbind the certificate from the IIS Web site
On the Web server computer, click Start, point to All Programs, point to Administrative Tools, and select Internet Information Services (IIS) Manager.
Double-click the local computer, and then double-click the Web Sites folder.
Right-click the Web site you are requesting a certificate for, and select Properties.
On the Directory Security tab, under Secure Communications, click Server Certificate.
In the Web Server Certificate Wizard, on the Welcome page, click Next.
On the Modify the Current Certificate Assignment page, select Remove the current certificate, and then click Next.
On the Remove a Certificate page, click Next.
On the wizard completion page**,** click Finish.
Close Internet Information Services Manager.
If you have simply used the Web server as a method of installing the certificate on the ISA Server, or no longer require a certificate on the Web server, you may want to delete the certificate from the Web server computer.
Delete the certificate from the computer
On the Web server computer, from the Start menu, point to All Programs, point to Administrative Tools, and select LocalComputerCertificates.msc (or the name that you provided when saving the certificates console).
In MMC, double-click Certificates (local computer), and then double-click Personal.
Click Certificates, and then right-click the certificate and click Delete.
In the warning dialog box, click OK to delete the certificate.
See Also
Concepts
Appendix B: Setting Up a Local Certification Authority (Windows SharePoint Services 2.0)