Use Zentyal Zarafa z-push with an N900
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); to define('LOOSE_PROVISIONING', true); now it should work.