How to send an invitation to all pending users?

In the "Members" section of the platform settings, click on 'Sending an invitation to all non-registered users'. By non-registered users the system means pending and draft users.

When you click on this link, a window invites you to write an invitation text that will be included in the email.

You can also (re) generate an invitation in real time to draft or pending users, by clicking on the Options to the left of a user on the list.