Suppose you're running phpBB with another php-driven application. phpBB has a "user" table where the username/password/email/.. of each user is stored at mysql. Once a user logs-in to the website, the "Last Login" timestamp updates on the "users" table at mysql. How do I use LDAP in this type of application? 1) Move entire records of "Users" and their attributes (e.g. last_login_time) to LDAP server? In this mehtod, after each successfull login request, I also need to update the related record on LDAP. 2) Should I use LDAP to store only the username and passwords? In this method, I need to update the record on MySQL database, but I should keep the MySQL and LDAP syncronized, since a user may want to change her password. What do you think guys? Please let me know.