This filterString gets all AD users from a specific AD group, I need to change this to get ALL users from ALL groups in my organization. I have read through dozens of similar questions and changed this string around several times and cannot find the solution.
String filterString = "(&(objectCategory=user)(memberOf=cn=" + this.ldapUserSearch + ",ou=Groups,OU=Organization,dc=organizationsoftware,dc=com))";
You can try the following filter, which includes an attribute presence clause:
(&(objectCategory=user)(memberOf=*))
This will return every user whose memberOf
attribute is set to any value. This should have the effect of retrieving all users from all groups.