I have a few web applications that use Active Directory to authenticate. What I would like to be able to do is provide a simple web page that would allow users to update their AD password. This wasn't a problem when the majority of the users had windows machines that connected to this AD server (and could ctrl-alt-del to change the password), but we are moving away from that and the AD server is mostly for web apps. Is there a simple solution for this, or am I looking at the big LDAP managers?