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" }