How to set up MFA for Microsoft 365 & how to configure client Side

Multifactor authentications (MFA) protect our organization against breaches due to lost or stolen credentials and can be enabled by the Office 365 global admin from the Admin Center. The Office 365 multi-factor authentication service is, in fact, a subset of the Azure MFA.

We can enable MFA with the following methods:

  • Turning Security defaults on or off
  • Using Conditional Access policies
  • Turning on Modern authentication (On each new Subscription It is automatically turned on)
  • Turning on MFA per user

One of the easier ways to secure and protect our organization is Turning on Modern authentication for all users. You must be a Global admin to manage MFA.

In the Microsoft 365 admin center, in the left nav choose Settings > Org settings.

Under the Services tab, choose multi-factor authentication, and in the Multi-factor authentication pane, choose configure multi-factor authentication.

On the new page, you may select all users or each one with the status MFA AUTH disabled and enable them

On the other hand regarding client side, each user may go to and fill the username@domain

Fill the password

Then, we will receive a new message about more information needed about MFA

I prefer a mobile app for Additional security verification

In this step a Microsoft Authenticator should be installed on mobile

Click next and approve the popup notification on your phone.

Click next and approve the popup notification on your phone.

That was the final step.

Normally, you will only require the extra verification method when you initially sign into a new app or device or after you’ve changed your password. Unless your company mandates it, you generally won’t be prompted for the extra verification code daily.

More info:

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