I have been trying to configure Alfresco authentication against our Active Directory for more than a month now without any luck. I have followed every conflicting instruction out there and re-installed Alfresco at least 30 times on 6 different servers on Windows 2K3, XP, Ubuntu and Solaris. I used Alfresco 3.2 CE and 3.2 nightly 2009-09-29. It does not seem possible to have everything working while authenticating against AD.
If I configure ntlm only then everything work but no AD authentication.
If I configure passthrough only then Alfresco and Share work, but VTI does not and this only works on Windows.
If I configure LDAP with no SSO then Alfresco works, my AD users are synchronised but no Share and no VTI.
The closest I could get to a fully working system is with the following settings in alfresco-global.properties. This gives me a working Alfresco, Share and CIFS but non working VTI and IMAP.