If VTC students have any problem on 2FA, please read the FAQ first.
https://2fa.stu.vtc.edu.hk/home/faq.html
Related links:
Activate 2Fa: https://cnatools.vtc.edu.hk/CNAPortal/ActivateStudentMFA.aspx
Reset 2FA: https://cnatools.vtc.edu.hk/CNAPortal/ResetMFA.aspx
Change authentication method: https://aka.ms/mfasetup