Below are example configurations for use with the LDAP backend and the Lotus Domino server.

$conf['auth']['ldap']['server']      = 'localhost';
$conf['auth']['ldap']['usertree']    = 'O=YourNotesOrganization/C=US';
$conf['auth']['ldap']['grouptree']   = 'O=YourNotesOrganization/C=US';
$conf['auth']['ldap']['userfilter']  = '(&(uid=%{user})(objectClass=dominoPerson))';
$conf['auth']['ldap']['groupfilter'] = '(&(objectClass=dominoGroup)(member=CN=%{user}))';
 
//Note: It is not necessary to populate both 'grouptree' and 'groupfilter'.
//You may have better results only populating one of these and commenting out the other

This allows you to login via the CN (Domino 'User Name') or the uid (Domino 'short name').

$conf['auth']['ldap']['server'] = 'ldap://myldap.mydomain.edu';
$conf['auth']['ldap']['port'] = '389';
$conf['auth']['ldap']['usertree']    = 'C=US';
$conf['auth']['ldap']['grouptree']   = 'RootDSE';
$conf['auth']['ldap']['userfilter']  = '(&(|(CN=%{user})(uid=%{user}))(objectClass=dominoPerson))';
$conf['auth']['ldap']['groupfilter'] = '(&(objectClass=dominoGroup)(member=CN=%{cn}*))';