crpb It also works with the community edition.
I tested with EM client, inbox mostly works but I got some errors:
[Exchange Web Services] Die Synchronisation des Ordners'wwww@vvvvv.at/Posteingang' ist fehlgeschlagen mit folgendem Fehler: Invalid character in the given encoding. Line 427, position 170.
and
[Exchange Web Services] Die Synchronisation des Ordners'wwww@vvvvv.at/Kalender' ist fehlgeschlagen mit folgendem Fehler: The element 'Attendee' in namespace 'Types' wasn't found at the current position.
Calendar and contacts are empty.