The CreateMapping method of the IIsCertMapper object maps a certificate to a Windows account.
IIsCertMapper.CreateMapping vCert, NtAcct, NtPwd, strName, IEnabled
<%
Dim CertObj, vCert
vCert = Request.ClientCertificate("CERTIFICATE")
Set CertObj = GetObject("IIS://..path../IIsCertMapper")
CertObj.CreateMapping vCert, "MYACCT", "MYPASS", "My Name", True
%>
DeleteMapping, GetMapping, SetAcct, SetEnabled, SetName, SetPwd