[Dovecot] NTLM authentication with Outlook 2010

[Kevin Bridges]

All, I have a Ubuntu 12.04.2 box running Dovecot 2.0.19.  I have it
configured for our active directory.  WBinfo and ntlm_auth work great.  I
am trying to get sso to work with ntlm.  Gssapi with thunderbird works like
it should.  I just cant get ntlm with outlook 2010 to work for sso.   I get
prompted for my password each time I open outlook.  I have attached my
config for dovecot.  Any help would be much appreciated.

# 2.0.19: /etc/dovecot/dovecot.conf
# OS: Linux 3.2.0-39-virtual x86_64 Ubuntu 12.04.2 LTS
auth_debug = yes
auth_debug_passwords = yes
auth_mechanisms = gssapi ntlm
auth_use_winbind = yes
auth_verbose = yes
auth_verbose_passwords = plain
debug_log_path = /var/log/dovecot_debug.log
log_path = /var/log/dovecot.log
mail_location = mdbox:~/mdbox
passdb {
  driver = pam
}
plugin {
  quota_rule = *:storage=2G
  quota_warning = storage=95%% quota-warning 95 %u
}
protocols = " imap"
service auth-worker {
  user = root
}
service auth {
  user = root
}
ssl_cert = </etc/ssl/certs/dovecot.pem
ssl_key = </etc/ssl/private/dovecot.pem
userdb {
  driver = passwd
}
protocol imap {
  mail_plugins = " quota imap_quota"
}