In order to export a list from your classlist and/or groups, you go to the Groups section.
Go to Course Tools and then select Groups.
Click Export to export a group or class.

In the next screen you can select a category and a group within that category (optional).

Click on Export at the bottom and the selected group(s) will be exported to an Excel file.
Please be aware that the exported data may include personal data which must be handeld carefully. Do not share this data outside of our university.