[Dovecot] Can we retrieve Dovecot Proxys 'hostName' from Director instead of LDAP?

[Edward Carraro]

We have a Dovecot installation of several nodes that share an NFS mount for
the user data.  We are trying to configure Dovecot Proxy with Director in
order to have Director select the appropriate IMAP server for a given user
on behave of Dovecot Proxy.  So far all examples I've seen on the dovecot
site require the proxy to know the exact mail server to pass the user to by
way of an LDAP lookup.

Does anyone know of a way to have Dovecot Proxy pick a server from Directors
status list instead of looking it up from LDAP?

Also, how does Director discover that an IMAP server is up or down so that
it can adjust in the case of a server failure? Is this something that
Director does automatically or do we need to manually change the mail
servers vhost count in case of an IMAP node failure?

Thanks