Sorry, can't read french.
Could you translate it to english please?

when I try to get the availability (free/busy) in outlook. I get the message "The suggestions are not provided because it is impossible to extract data" 

in ocsmanager.log I found the following error :

same error with outlook 2007 and 2010

2013-05-02 13:21:28,938 INFO [openchange.web.auth.NTLMAuthHandler] [worker 3] client did not pass auth cookie
2013-05-02 13:21:29,470 INFO [openchange.web.auth.NTLMAuthHandler] [worker 6] client did not pass auth cookie
2013-05-02 13:21:29,470 INFO [openchange.web.auth.NTLMAuthHandler] [worker 6] acquiring lock /var/cache/ntlmauthhandler/ntlm-127.0.0.1.lock (2738)
2013-05-02 13:21:30,530 INFO [openchange.web.auth.NTLMAuthHandler] [worker 4] acquiring lock /var/cache/ntlmauthhandler/ntlm-127.0.0.1.lock (2738)
2013-05-02 13:21:30,580 ERROR [spyne.application] [worker 4] (32, 'No such Base DN: CN=Claude Daoust,CN=First Administrative Group,CN=First Organization,CN=AGENDA,DC=icod,DC=ca')
Traceback (most recent call last):
File "/usr/lib/python2.6/site-packages/spyne/application.py", line 120, in process_request
ctx.out_object = self.call_wrapper(ctx)
File "/usr/lib/python2.6/site-packages/spyne/application.py", line 164, in call_wrapper
return ctx.service_class.call_wrapper(ctx)
File "/usr/lib/python2.6/site-packages/spyne/service.py", line 212, in call_wrapper
return ctx.function(ctx, *ctx.in_object)
File "/usr/lib/python2.6/site-packages/ocsmanager/controllers/as.py", line 460, in GetUserAvailabilityRequest
calendar_folder = ExchangeService._open_user_calendar_folder(user_email)
File "/usr/lib/python2.6/site-packages/ocsmanager/controllers/as.py", line 307, in _open_user_calendar_folder
expression=ldb_filter, attrs=["MAPIStoreURI"])
LdbError: (32, 'No such Base DN: CN=Claude Daoust,CN=First Administrative Group,CN=First Organization,CN=AGENDA,DC=icod,DC=ca')
2013-05-02 13:21:36,066 INFO [openchange.web.auth.NTLMAuthHandler] [worker 5] client did not pass auth cookie
2013-05-02 13:21:36,067 INFO [openchange.web.auth.NTLMAuthHandler] [worker 5] acquiring lock /var/cache/ntlmauthhandler/ntlm-127.0.0.1.lock (2738)
2013-05-02 13:21:36,581 INFO [openchange.web.auth.NTLMAuthHandler] [worker 7] acquiring lock /var/cache/ntlmauthhandler/ntlm-127.0.0.1.lock (2738)

I added english subject as I understand your request.

SOGo/OpenChange will only be able to get freebusy data of users that have logged in at least once in SOGo/OpenChange from Outlook.

we have users that will use outlook and others will use thunderbird. can you add the support to get freebusy data for any user regardless of client it use.

Nous avons des usagé qui utiliserons outlook et d'autres utiliserons thunderbird. Pouvez-vous ajouter la fonctionnalité qui permettra de récupérer les infos de disponiblité peut importe le client utilisé.

Retry with v2.3. Reopen if necessary.