How to enforce multi-factor authentication on Microsoft 365 (Office 365)
To enable MFA in Microsoft 365 you have a few options and we have a guide for each. If you're not sure which option is best for you, read this blog which summarizes and lays out the pros and cons of each option.
Generally, if you have Azure AD P1 licenses, we recommend you choose Conditional Access. Otherwise, we recommend Security Defaults.
Once you know your way forward, choose the right guide below: