Mac OS X 10.7: Configuring OS X to Active Directory - GROK Knowledge Base
http://grok.lsu.edu/article.aspx?articleid=15883 Notes on how to authenticate Mac OS X 10.7
http://grok.lsu.edu/article.aspx?articleid=15883 Notes on how to authenticate Mac OS X 10.7
http://grok.lsu.edu/article.aspx?articleid=15883 Notes on how to authenticate Mac OS X 10.7
http://grok.lsu.edu/article.aspx?articleid=15883 Notes on how to authenticate Mac OS X 10.7
http://support.microsoft.com/kb/555092 Apache authentication against AD (via Kerberos). Really easy to do, but make sure you put your kerberos real all in UPPER CASE, i.e. MYDOMAIN.COM. If you are using something like MYDOMIAN, then put it into config as MYDOMAIN.LOCAL
http://debian.telenet.ru/adjustmentsoft/samba_pdc short how-to about configuring AD PDC using debain+samba+ldap+kerberos