Click "Participants" tab on the course page.

Enrolled users
Enrolment methods
Groups
Groupings
Overview
Permissions
Other users
Check permissions

On the Groups page, scroll down and click "Auto-create groups" button.

Under "General" tab, in the "Auto Create Based on" from the dropdown select "Class ID".

Number of groups
Members per group
Class ID

In the Groups list appears updated list of groups with enrolled students based on the students tutorials selection on MyUNSW.

1231 (2)
1232 (2)
1233 (1)
1234 (1)
Group A (2)
Group B (2)
Group C (3)
Team Builder Tut Group 1 (3)
Team Builder Tut Group 2 (3)

How to Auto-update Groups based on Class ID