Right after the Update to V14 our Exchange Server Sync for Contacts worked just fine. After some days or weeks (cannot really tell) it suddenly stopped working updating contacts. I thought, it might just not start an update, so i tried to empty the configuration for exchange sync. It worked... and the 3cx directory was flushed right away... so it actually did sotmething. However, i cannot figure out, why it would not update the contacts from our exchange Server anymore, since there are NO hints at all in the server logs. Those things should really be in the logs!