Hah, thank you for the efforts. I am still persuadable. I'm confused I guess about Zarafa and it's lack of an administrative section like GroupOffice (login as admin/admin and handle the backend part of GO) has. I did give myself the Zarafa 'admin' rights inside Zentyal and I don't see an 'administrative' screen in Zarafa.
I like GroupOffice's ability to have 'groups' with permissions to write/manage specific resources.
I do like Zarafa's distribution lists. I wonder how it compares to Mailman mail lists.
http://www.zarafa.com/content/editions <- on this page it says that the community edition lacks "advanced multi-user calendar" support. This is why I steered clear of it in the first place.
Thank you for taking the time to work on getting GO integrated into the LDAP part of Zentyal.
-Andy