If the LDAP server does not support anonymous searches, you must specify the distinguished name of the user to bind and the bind password in the /etc/hue/conf/hue.ini file:

# Distinguished name of the user to bind as -- not necessary if the LDAP server    
# supports anonymous searches
bind_dn="CN=ServiceAccount,DC=mycompany,DC=com"

# Password of the bind user -- not necessary if the LDAP server supports
# anonymous searches
bind_password=your_password