There are several methods you can use to authenticate. And you should set up more than one so you've always got a backup.
|Microsoft Authenticator mobile app||Recommended method. Works on Android and Apple Smartphones|
|Codes sent via text to a mobile phone|
|Code sent via landline (eg home or office phone)||You can set up any phone to receive a code. If you are working remotely, you can still access your office phones using Jabber. Here is a guide on setting up and using Jabber https://www.phone.cam.ac.uk/your-phone/UsingJabber|
|Code from hardware token||Not recommended as UIS have not yet determined how to provide the tokens|
|Twilio Authy||There is currently no UIS documentation about how this could be set up|
Setting up your authentication methods