[horde] Changing prefs globally

[Kevin Konowalec]

I got a message from our mailserver admin that the sent mail folder  
needs to change.  In the imp/config/prefs.php file there is the  
following:

// sent mail folder
$_prefs['sent_mail_folder'] = array(
     'value' => 'sent-mail',
// For Exchange server uncomment the line below and delete the line  
above
//    'value' => 'Sent Items',
     'locked' => false,
     'shared' => false,
     'type' => 'implicit');


The way I understand it, this is now set for all my users in their  
individual prefs.  If I change it, how do I apply the change across  
the whole database (mySQL)?