Adding users to a particular organization is helpful if you want to run reports or filter users according to their organization.
You can do so automatically by specifying the email domain name under the Organization. This would mean that whenever a user with that email domain registers at Kayako, he would automatically get added to the Organization. The settings can be found under Staff CP > Users > Manage Organizations > Select the Organization > General Tab > Email domain filters.
Sandeep Kaur