If you need to add multiple OU= values in the LDAP url you must have separate LDAP urls and utilize AuthnProviderAlias to check both LDAP searches.
LoadModule authn_alias_module modules/mod_authn_alias.so <AuthnProviderAlias ldap ldap-alias1> AuthLDAPBindDN cn=youruser,o=ctx AuthLDAPBindPassword yourpassword AuthLDAPURL ldap://ldap.host/o=ctx </AuthnProviderAlias> <AuthnProviderAlias ldap ldap-other-alias> AuthLDAPBindDN cn=yourotheruser,o=dev AuthLDAPBindPassword yourotherpassword AuthLDAPURL ldap://other.ldap.host/o=dev?cn </AuthnProviderAlias> Alias /secure /webpages/secure <Directory /webpages/secure> Order deny,allow Allow from all AuthBasicProvider ldap-other-alias ldap-alias1 AuthType Basic AuthName LDAP_Protected_Place AuthzLDAPAuthoritative off Require valid-user </Directory>