my .htaccess inside :

AuthType Basic
Authname "Login using mail username without domain"
AuthBasicProvider "ldap"
AuthLDAPURL "ldap://zimbra.testing.co.id/ou=people,dc=testing,dc=co,dc=id?uid?sub?(objectClass=organizationalPerson)"
AuthLDAPBindDN uid=zimbra,cn=admins,cn=zimbra
AuthLDAPBindPassword ZIMBRALDAPPASSWORD
authzldapauthoritative Off
require valid-user