Hello, I'm posting this only in the event somebody else does a search in the mlist archive for such keywords (I know I did), hope you won't mind. Status: IT WORKS! :) Steps taken: Install Slackware (well, that was already in place). Install PAM (Linux-PAM-0.77, plain ./configure) - this I will need later for Postfix SMTP auth against AD. Install Kerberos (krb5-1.2.8, ./configure --prefix=/usr/local/kerberos --without-krb4 --enable-dns --enable-dns-for-kdc --enable-dns-for-realm --enable-shared). Install OpenLDAP (openldap-2.1.22, ./configure --disable-slapd --disable-slurpd). Install Samba (samba-3.0.0beta3, ./configure --prefix=/usr/local/samba --with-smbwrapper --with-dce-dfs --with-ads --with-smbmount --with-pam --with-libsmbclient --with-acl-support --with-winbind --with-krb5=/usr/local/kerberos --without-quotas --with-ldap) joe /etc/krb5.conf [realms] DOM.AIN = { kdc = DC.DOM.AIN } test with kinit SOMEUSER@DOM.AIN joe /usr/local/samba/lib/smb.conf [global] security = ADS realm = DOM.AIN winbind use default domain = yes wins server = dc.dom.ain encrypt passwords = yes password server = dc.dom.ain net ads join <domain> -U Administrator nmbd -D smbd -D winbindd ..that's all I think PS. Thanks to the Samba team for the great work