Kolab 3 and Activesync
Kolab 3 has built-in ActiveSync [https://www.kolab.org/about/syncroton] support,
using Syncroton [http://www.syncroton.org/wiki/Main_Page].
It's integrated into Roundcube, all settings can be done using the Webmail
client. Installing it is very easy on Debian Wheezy: apt-get install
kolab-syncroton
If Kolab 3