Integrated in Administration - Users - Complete file, the grouped actions allow you to perform operations on a selection of users.
Here are the current possibilities:
Below is a short overview of how to send a grouped message. This is a powerful feature coupled with the search fields and filters. You can for example send a message only to expired members in 3 clicks.
Moreover, if a member has not filled in his email address, he will still receive an internal message on BalleJaune.