Flush cache - Directory users and groups

Hi all,

The built-in server-lifetime cache holders "Directory users and groups" is
not flushed automatically when a change occurs: when some users are added
in a group (using Console One), they don't appear in that group on exteNd
Director side. To see the change, I have to go in the General
Configuration Section of the DAC, and to flush the cache manually. The
cache is not flushed automatically by the system.
How can I ensure that all changes done in Console One are replicated
automatically, without having to flush the cache manually.
In fact, the change are perfomed in Console One on the master eDirectory
and synchronized to another edirectory via dirXML. This synchronisation is
ok. But the changes don't appear automatically in exteNd Director.

Thanks in advance for any help.
Regards,

Cathy