Horde and LDAP for Kolab

[Richard Kemp]

Since I installed Horde for Kolab on my server, I noticed that I can't
change anymore the user's attributes in the Kolab administration :
LDAP Error: could not modify object cn=xxx,dc=xxx,dc=xxx,dc=xxx Object 
class violation

After a few tests, if I comment this line from slapd.conf, it works again :

include         /kolab/var/kolab/www/horde/scripts/ldap/horde.schema

I try to understand horde.schema, but no answer come to me ...

Does someone who use Horde noticed the same problem ?
How to add the horde schema in ldap without locking the possibility of 
changing the settings ?


Thanks for any help

--
Richard Kemp