From Signitic, you have the ability to manage all your team members with the buttons on the grouped action list.
From the Users, select your users using the checkboxes to the left of each user or sort them with the filters available at the top of the page.
Then click on the Export button on the grouped actions bar:
Once your action has been confirmed, an Excel file will be downloaded with a list of your filtered users' emails.
This allows you, for example, to send a reminder email to users whose plug-in is still not installed!