[sync] Syncing mails on iPhone (Horde4)

[arnaud icard]

Hello,

is there a way to synchronize mails on iPhone via an Exchange account ?

I can sync the calendar and contact. However I have the error below with 
mails :
2011-04-13T12:20:24+02:00 ERR: HORDE [imp] IMAP error: 
[AUTHENTICATIONFAILED] Authentication failed. [pid 13195 on line 212 of 
"/usr/share/php/Horde/Imap/Client/Base.php"]
2011-04-13T12:20:24+02:00 DEBUG:  1. Horde_Rpc_ActiveSync->getResponse() 
/var/www/horde/rpc.php:128
  2. Horde_ActiveSync->handleRequest() 
/usr/share/php/Horde/Rpc/ActiveSync.php:129
[...]


I found this compatibility table on this webpage 
http://wiki.horde.org/h/wicked/ActiveSync but it is fairly old.

Please note that I perfectly log onto my Horde portal using IMAP 
authentication.

When putting hordeauth to false in the backends.php file, I cannot log 
on automatically from Horde portal to IMP any more but I retrieve a 
strange and empty folder in the Mail app's iPhone named 
70FB9178-576E-4CAA-... I then have the same error.

Any idea is welcome.

Best regards,
arnaud