If a user's account invitation email expired before they could create a password and login, Kno2 administrators may resend it from Settings > Users or Settings > Network Users.
Search for and select the user who needs their invitation resent.
Select the drop-down menu on the far right of that user line.
Select Resend Invitation.
Select OK to confirm and a new invitation will be emailed to them. Invitations are good for 24 hours.