@morrow without logs this will be hard to track down. can you ask your administrator to open up a support case for this?
With Zarafa WebAccess you can access Zarafa via your internet browser.
The Zarafa WebAccess contains features such as:
Easy email sharing
Advanced search for any item
Zarafa fosters innovation. In Q2 2012 Zarafa launched a first preview of the successor to the current web client, the Zarafa WebApp. The Zarafa WebApp is a new online collaboration interface, developed with ExtJS, a highly flexible framework, that provides:
Additionally the plug-in framework extensions and library development will bring optional features such as online chat and video conferencing integration, web storage and desktop integrations.
WebApp is included in the latest ZCP 7.0 and 7.1 versions and can be used next to WebAccess.