How often does lightning fax, installed on a separate server, re-sync up with Exchange recipients to update it's fax number routing tables? I have a Unity 2.4.6 that when the administrator deletes the user out of Unity, then NT and Exchange the fax number stays in lightning fax database. He cannot add another user with that same fax number until lightning fax updates its database. I know how to update the database by hand but I need to know how long will it take to do it automatically? Thanks in advance. <br><br>