dovecot-ldap.conf

hosts = 192.168.0.233
dn = aduser@domain.localnet
dnpass = aduserpwd
debug_level = 1
auth_bind = yes
ldap_version = 3
base = DC=domain, DC=localnet
scope = subtree

# Password check
pass_filter = (&(objectCategory=person)(sAMAccountName=%u))

# Users check
user_attrs = sAMAccountName=home
user_filter = (&(objectCategory=person)(sAMAccountName=%u))