RE: Exporting LDAP info from Active Directory / Exchange GlobalAddress List

A reverse caching proxy stores the data in a transient cache. This might not be what you want when saying "exporting most information" from GAL. > People can then use the OpenLDAP server as a Directory source in Outlook > without needing to log in to anything. If that's your main goal you can use a reverse proxy. If you want to use the proxycache overlay slapo-pcache is the 2nd question. See man slapd-ldap.5 for back-ldap and look at configuration directives starting with "idassert".