How To Enable Multi-Factor Authentication In Office 365

In this blog post, I’ll show you how to enable Multi-Factor Authentication (MFA) In Microsoft Office 365 for a single or bulk user.

Office 365 Multi-Factor Authentication (MFA) is an added service that is part of Microsoft Azure and is linked to Azure Active Directory where all Office 365 identities reside.

Using MFA we access Office 365 Services using a password and another verification method in the form of an SMS code, Phone Call with code or Mobile app code.


Azure Multi-Factor Authentication (MFA) is a Microsoft’s deployment for two-step verification solution and it works very well.

Azure MFA comes with four verification methods:

  • Phone call
  • SMS text message
  • Mobile app verification code
  • Mobile app notification

To enable MFA for users you need to be a Global Administrator.

Get Started

To enable MFA for a single user or bulk, I’ll sign in to the Office 365 portal and in the search box I type Multi

In the Azure multi-factor authentication, I click Azure Multi-factor authentication and I’ll be redirected to the Azure Portal

In the MFA page, I have the option to enable MFA for a single user or Multiple users using the tick box next to the user or users.

To select all users I can select the tick box next to Display Name

Once selected all I have to do is click Enable to enable it

Next, I’ll confirm It in the next screen

If you would like to force users to use MFA when using Outlook or Skype For business click on Enforce and set up an app password

Next time my user logs in he will be asked to enter a code sent via SMS to his phone