dsconfigad binds to Active Directory domain, logins fail in 10.6.2
dsconfigad -f -domain sns.ias.edu -u pcuser -p foo -lu admin -lp foo -ou ou=Macs,dc=example,dc=com
The result is "Computer was successfully added to Active Directory". However, logins fail, and Active Directory isn't "checked" in Directory Utility.
If the directory bind is done with Directory Utility everything works, but dsconfigad alone only binds, but does not "enable" Active Directory.
Mac OS X (10.6.2)