Multi-Factor Authentication for Office 365

Q: (from Bill)

I have a quick question on two factor authorization for Office 365.  Is it available with all plans (i.e. business essentials, premium, E1, E3)?

A:

My Bing search on “Office 365 Multi-Factor Authentication” I found LOTS of resources on how to enable MFA and that announced adding MFA to Office 365 from February 2014 before the Business plans were announced, but nothing that confirmed MFA for the Business plans.

Finally I thought to look at the Office 365 Service Descriptions:

https://technet.microsoft.com/en-us/library/office-365-platform-service-description.aspx

And in the section under User Account Management:

   Steve