After you create a group, you can change the description of the group and the list of users in the group. You cannot change the name of the group or the parent of the group. To change the parent of the group, you must move the group to another group.
In the Administrator tool, click the Security tab.
In the Groups section of the Navigator, select a native group and click Edit.
Change the description of the group.
To change the list of users in the group, click the Users tab.
The Users tab displays the list of users in the domain and the list of users assigned to the group.
To assign users to the group, select a user account in the All Users column and click Add.
To remove a user from a group, select a user account in the Assigned Users column and click Remove.