We had a version of the Basic Connectors (we do not use it more) that synchronized the employee class with AD, but not the “Users” class. You can write a program outside CMDBuild that reads AD and writes in the class “User” of CMDBuild through the REST or SOAP webservices. CMDBuild Team
I understand that your need was to populate the “User” system class. If “Users” is a class that you create in your data model is not necessary to change the name. However, both to configure and use the Basic Connector ( http://www.cmdbuild.org/forum/forum-in-english/136149002?b_start=0#56162126 ) that to implement a custom connector using the CMDBuild webservices are needed technical skills. There is also a version CMDBuild Ready2Use with AD connector already configured (you can find information on the website) but the full use requires a subscription. CMDBuild Team