Multi-factor authentication (MFA) on Office 365 helps protect your and VU’s information assets. MFA adds an additional layer of security on top of your regular username and password, which makes it harder for hackers to log into your account as if they were you.
When logging in to Office 365 from outside the VU network, MFA will prompt you to verify via your smartphone or tablet that it's you. This prompt is known as an MFA challenge.
MFA will only send you a challenge notification if you are attempting to log in from outside of the VU network.
Currently MFA is optional, but will be compulsory for all staff and students in 2020.