How to remove a user from a group:
- Go to Admin view - Administration. (if you can't see Administration in the menu on the left, please notify your system administrator)
- Under Organisation, you can view your group(s).
- Choose the group the user is in, click "x users". You will come to a view with user cards.
- Mark the user card you wish to remove from the group and click delete (see screenshot below).
Read more: How to add a user to a group