OK I finally got round to converting this thing to the wiki!
Zarafa How-To here
The future is bright! :) Zarafa integration is being developed by ClearFoundation for ClearOS 6, along with other improvements to the LDAP system should mean that we can have a much better product going forward
Anyone tried Zarafa 7??
If you need info regarding Zarafa intergration, you can see the HOW-TO or Form posting.
Forms here - http://www.clearfoundation.com/component/option,com_kunena/Itemid,232/catid,40/func,view/id,1983/
How-To - To be created