I've got ZCS v6.0.13 running on Ubuntu 8.4, and I'd like to set it up to authenticate against my list of Active Directory users (on a separate Windows server). I've done my research here in the forums and in the Zimbra Wiki about how to set this up, and I understand the configuration procedure. However, I'm concerned about how Zimbra will actually create these mailboxes once the config procedure is finished.
I already have most of my users set up with mailboxes in Zimbra (as well as with user accounts in Active Directory), and I want my existing users to keep their existing mail. When I set up external authentication with Active Directory, will these existing mailboxes be deleted/duplicated/modified in any way? Any information would be helpful. Thank you.