You can identify users by their `@phys.ethz.ch` and groups by their `@localhost` suffixes, respectively.
Note that you cannot directly search for `<groupname>@localhost`, so please only search for the groupname and scroll down in the filtered results to pick the `<groupname>@localhost` item.
If you tick the 'Subscribe user' checkbox, the user(s) will be automagically subscribed, otherwise they'll have to do this manually. Be careful with this option when sharing to (large) groups...
Then set the visibility and edit options to your liking.
