couier imap: authldaprc : active directory ldap

LDAP_SERVER 1.1.1.1
LDAP_PORT 3268
LDAP_PROTOCOL_VERSION 3
LDAP_BASEDN dc=example,dc=com
LDAP_BINDDN authuser@example.com
LDAP_BINDPW mysecretpassword
LDAP_TIMEOUT 5
LDAP_AUTHBIND 1
LDAP_MAIL sAMAccountName
LDAP_FILTER (objectClass=*)
LDAP_GLOB_UID 10002
LDAP_GLOB_GID 10002
LDAP_HOMEDIR sAMAccountName
LDAP_MAILROOT /var/mail
LDAP_MAILDIR mailbox
LDAP_DEFAULTDELIVERY defaultDelivery
LDAP_FULLNAME cn
LDAP_CRYPTPW userPassword
LDAP_UID 10000
LDAP_GID 10000
LDAP_DEREF never
LDAP_TLS 0

issue, users directories (inc maildir) aren't automatically created by courier.