When an invitation is sent out, the recipient receives an email with a button to join a Group or a Discussion*.
The email also includes a button to register with LORROS (if they are not already). Once registered, they simply click the join the group or join the discussion button in the email. As soon as they click the button, they will be taken to either the Group page or the Discussion.
*There are two types of invitations – to join a Group or to join a Discussion (see Guest Links)