What Happens When…

…you delete a group:

If you've selected the Auto-enroll new users option, users are automatically distributed in the remaining groups.
If groups are set up for manual enrollment, you must add users to the remaining groups using the Enroll Users page.
Group discussion forums remain available for reference. You can delete them in the Discussions tool.
Group locker areas and the files they contain are deleted.
Group assignment submission folders and the files they contain are deleted.

Users are no longer enrolled in groups because they do not exist.
Group discussion forums remain available for reference. You can delete them in the Discussions tool.
Group Locker areas and the files they contain are deleted.
Group assignment submission folders and the files they contain are deleted.

Discussion posts remain in the old group and do not count towards a user’s grade if the forum or topic is associated with a grade item. The user must satisfy the discussion post requirements in the new section. (You can override a grade using the Grades tool.)
Locker files remain in the old group. Users must add any files they want to keep to the new Locker area themselves.
Assignments submissions submitted for the old group remain with the old group. The user receives the grade achieved by the new group on any group assignment submission folders. (You can change the user’s grade back to the original group’s mark in the Grades tool.)