06/10/2026
MFA isn't enough anymore.
MFA-bypass attacks ("prompt bombing," attacker-in-the-middle proxies like Evilginx) now account for roughly 1 in 3 successful M365 account compromises in our incident data over the last 12 months.
The fix isn't more authentication. It's *smarter* authentication:
• **Conditional Access policies** that require sign-in from a managed device or trusted network.
• **Number-matching MFA** instead of simple approve / deny push (kills prompt bombing).
• **Token-binding session policies** so a stolen cookie can't be replayed from a different IP.
All three are included in M365 Business Premium. Most of our clients aren't using them. We turn them on as part of Managed Inbox at \$20/mailbox.