Office 365 - How to add an Additional Factor (2FA)
2FA gives users the option to add a preferred authentication factor.
To add an additional factor, complete the steps below:
Click on Link to access your Account.
Under My Account click Security info.
Next, click Add method to add a factor.
Click on the drop down arrow on the right hand corner of your display screen to choose a preferred authentication factor.
Next, follow prompts to complete authentication