Problem with cyrquota information

[GARETTE Emmanuel]

I don't use quota on my kolab server, but I want to known size of each 
boxes.

I'm trying to use cyrquota (su - kolab-r -c "/kolab/bin/cyrquota") but I 
have strang information :

------------------------------------------------------------------
   Quota  % Used    Used Root
[...]
                 3462910 user/user1 at domain.fr
                  218526 user/user2 at domain.fr

[...]
------------------------------------------------------------------
In the server we have :

------------------------------------------------------------------
/kolab/var/imapd/spool/domain/domain.fr/user/user1# du -hs
3,4G    .
/kolab/var/imapd/spool/domain/domain.fr/user/user2# du -hs
6,2G    .
------------------------------------------------------------------

User1 information are greats, but not for user2.

Is someone has this kind of problem and a solution ?