I'm currently trying to decide if I'll be using the Open Source Edition or the Network Edition of Zimbra and I have some questions...

- Is it possible to use an external LDAP server (like ApacheDS) for user authentication with the ZCS Open Source Edition? I know the Network Edition permits it.

- Other question, does the Open Source Edition offers the same Web Services API than the Network Edition?
For example, is it also possible to create a meeting request using the famous ZMailbox class with the Open Source Edition?