You can remove users from groups if their roles or responsibilities change or if they leave the company, by following these steps:
1.Go to Management | Administration.
2.Select Users.
3.To search for the active user name, select by user.
4.Press Search. All active existing users will be displayed, each with a blank check-box by the User Name.
5.Select a user by clicking on the check-box.
6.Click the Groups link. The Assign Group screen will be displayed. This shows all groups to which this user belongs.
7.To remove the user from a specific group, select the group name by clicking on the checked box next to it. The check mark will disappear. Press Save. The user is now removed from membership in that group.