Article ID: 194788
This article was previously published under Q194788
We strongly recommend that all users upgrade to Microsoft Internet Information Services (IIS) version 6.0 running on Microsoft Windows Server 2003. IIS 6.0 significantly increases Web infrastructure security. For more information about IIS security-related topics, visit the following Microsoft Web site:
When you use Internet Explorer and attempt to connect to a Web server that requires Client Certificates, the browser may not display applicable Client Certificates. However, the Client Certificates are visible in the Authorities area of Internet Explorer Options.
If you use Internet Information Server (IIS) 4.0 with Secure Sockets Layer (SSL) and you have installed a root certifying authority certificate (other than those issued by well-known third parties, such as VeriSign, Thawte Consulting, or Microsoft), you may need to reinstall the affected root certifying authority certificates after you install SP4. You need to do this if you are using Microsoft Certificate Server 1.0, which shipped with the Windows NT Option Pack.
Internet Information Server 4.0 has Windows NT Service Pack 4 installed, which includes an updated Capi32.dll.
This behavior is by design.
The Iisca.exe program that resolved this issue prior to this service pack is no longer functional after you install Service Pack 4.
The following changes must made to the Internet Information Server computer, not the browser computer.
To reinstall the root certifying authority certificate:
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