Hi Craig and hassanizhar

Thanks for this . Yes we found this setting and changed it to "prevent" user access to other groups.

However, nothing changed.

To recap we have:

- changed the Trainer role permission to "prevent" access to other groups

- Created a separate group and added a handful of users enrolled on the course and added the trainer

- We then clicked on the manage quiz attempts block when logged in as trainer 

-  Instead of seeing the 6 learners we added to the separate group we see all 944 learners enrolled on the course 

Are we missing another step?

Thanks

Paul