We want to use iisClientCertificateMappingAuthentication to allow access for Clients with certain certificates only. We want to use manyToOneMappings to keep the number of entries small and minimize administrative burden. We experienced that the rules do not work reliable. E.g. on some certificates a...

(I renamed this post since the long URL was breaking the site design - Pete.) Config reference link: http://www.iis.net/ConfigReference/system.webServer/security/authentication/iisClientCertificateMappingAuthentication That reference material really should include a reference to the SSL configuration...