Today I had the problem that my Nokia N900 Mail for Exchange could not sync with my Zentyal server via Active Sync. After some research I found a solution in the Zarafa forum.

It consists of activating LOOSE_PROVISIONING in your z-push config.php. If you are using Zentyal 2.0 this is located at /usr/share/z-push/config.php and you have to change the line:

define('LOOSE_PROVISIONING', false);


define('LOOSE_PROVISIONING', true);

now it should work. Unfortunately I’m not sure if this gets overwritten during the next update!