Hi Samba 4 tells me that my DN is CN=MicrosoftDNS,CN=System,DC=hh3,DC=site But phpldapadmin will not accept this. Unable to connect to LDAP server Samba4 LDAP Server Error: Invalid credentials (49) for user Failed to Authenticate to server Invalid Username or Password. What is the DN of a standard install after provisioning? /srv/www/htdocs/phpldapadmin/cnfig/config.php $i=0; $servers = new Datastore; $servers->newServer('ldap_pla'); $servers->SetValue('server','name','Samba4 LDAP Server'); $servers->SetValue('server','host','ldapi://%2Fusr%2Flocal%2Fsamba%2Fpriva //$servers->SetValue('server','auth_type','session'); $servers->SetValue('login','attr','dn'); Thanks Steve.