Yes, that was it, many thanks!
BTW: Is this a flaw in sssd or is it a known problem?

Thanks.
Ondrej

On 08/02/2012 04:01 PM, Simo Sorce wrote:

On Thu, 2012-08-02 at 15:43 +0200, Ondrej Valousek wrote:

(Thu Aug  2 14:19:35 2012) [sssd[be[default]]]
[sdap_ldap_connect_callback_del] (0x4000): Closing LDAP connection
with fd [35].
(Thu Aug  2 14:19:35 2012) [sssd[be[default]]] [sdap_process_message]
(0x4000): Message type: [LDAP_RES_SEARCH_REFERENCE]

I think you should turn off resolving referrals with AD for now.

Simo.