We have successfully integrated ldap for login so what users can login to alfresco using their mail/zimbra credentials. We now want the user to click on a link say "email" on the alfresco navigation and be taken to their zimbra inbox without being logged in. To do this, I understand that we need to use Zimbra's existing Preauth functionality http://wiki.zimbra.com/wiki/Preauth to achieve what is required. But to implement preauth looks like there will be some basic coding required (to create the hashes etc). I searched this forum to see if somebody has done this before but results came negative? Are their any extensions or addons already created and donated to the community which can do this? Any help will be greatly appreciated. Thanks!