I currently have a Zimbra Collaboration Suite 4.5.4 rPath installation set up. I am looking to create something of a Single Sign-On environment using authentication from the ZCS ldap set up. Specifically, for my first test, I am looking to set up Drupal to perform ldap authentication from ZCS.

However, I will admit a very real level of ignorance when it comes to this sort of configuration. If anyone can point me to some good resources on Zimbra ldap mappings or, better yet, someone who has done it can provide a walkthrough, I would very much be in your debt.