We are running an internal CA and automatically issuing certs to all users through active directory. I have configured an LDAP address book that will do a search of Active Directory, but when I try to find the certificate when sending an email I get an "LDAP Error - operations error". Does anyone know if this is possible and if so why I am getting the LDAP error? I have the Microsoft Enhanced Cryptographic Provider v1.0 selected as the security provider if that makes a difference.