You will need advanced access to the Management Console to create, amend or to remove groups.

In the Management Console, under the advanced settings, you will be able to open the groups tab

To add aa group, simply click add group and you will be able to create a groups for your organisation. You will then have the open to share this groups with another organisation. If you would not like to do this, leave this box blank.

You have the option to amend the group or to delete the group on the right hand side. If you are editing a group, you can change the name of a groups, share the group with another organisation retroactively and limit the view of the group for the respective organisation.