[Dovecot] LDAP Authentication with multiple independent domains

[Alex Cherniak]

Is it possible to authenticate users against multiple independent AD domains?
In my dovecot-ldap.conf I entered two hosts:

hosts = host1 host 2
auth_bind_userdn = %d\%n
ldap_version = 3
base = cn=users,dc=%d,dc=net
auth_bind = yes

but OpenLDAP seems to stop authentication as soon as the first host
succeeds or fails.
I also tried to configure trust between the two, but it didn't work either.
Please help...