Our Zimbra server is configured to authenticate using our Active Directory and this works fine. Our users can use their active directory password to login to IMAP and POP3 and of course the Web Client.

The problem is that they can NOT bind to Zimbra's ldap server in order to access the GAL with clients such as Thunderbird.

Is there any way to authenticate using Active Directory when binding to Zimbra's ldap server?

I know anonymous bind is available but I want to require authentication.

Thanks for any suggestions.