Add/Remove Sub-Groups in a Group Modify a group to add or remove sub-groups. Select the Member (Groups) tab. Select . The Group Membership screen appears. Select the check box for the group/s you want to add as a sub-group. To remove a sub-group from a group, clear the check box. Select Apply. The groups are added (or removed) as sub-groups in the group. The users added to the sub-groups are automatically associated to the main group.