Actually i just want to sync my calendar, contacts can be, but are not so important, and finally NO email, because i access via IMAP.
All has to be done WITHOUT Microsoft products aka Windows / Outlook / ActiveSync...
As i am administrating two Zimbra servers and one cluster, i could host myself. But my clients don't need Zimbra NE, so maybe the strategy should be to sell them the necessary of an upgrade to the 'full' Zimbra
They drive a nice business model !
/harry