If we want to remind the user to register or for any reason outside the system the user does not receive or delete the original invitation, you can always "re-send" the invitation:
For a user simply click on the right menu of that user in the list of "Invited users" and press the arrow that appears.
Another way to resend massive invitations is through the checkbox on the left.
Marking the users to whom you want to send the invitation again and then pressing "SEND INVITATIONS" by displaying the menu from the upper arrow.
IMPORTANT: the mass mailing through this system is done page by page ie if we select the top checkbox will mark all of that page and will be sent but if there are more pages with users and we want to send the invitation, we should navigate to those pages and repeat the process.
A third and most appropriate way to resend all invitations is through the user lists page, menu to the right of each list (...):
All pending invitations will be resent.
The "DATE" field indicates the date the user was added to the list.
The "UPDATED" field indicates the date of the last invitation.