Multi-factor authentication helps secure Office 365 Users sign-ins for services beyond regular single password mechanism. With MFA for Office 365, users are required to acknowledge a phone call, text message, or app notification on their smart phones after correctly entering their passwords. They will be allowed to use the services only after this second authentication factor has been validated.
To set up multi-factor authentication app for Office 365 we need to follow the below steps
Sign in to the Office 365 admin center though the Portal
In the admin center, choose users and groups > Active Users.
In the classic admin center, next to Set Multi-factor authentication requirements, choose Set up.
In the admin center preview, choose More > setup azure multi-factor auth.
Find the user or users that you want to enable for MFA. Best Way is search for the user
Check the check box next to the names you chose.
This will reveal two options on the right: Enable and Manage user settings. Choose Enable.
In the dialog box that opens, choose enable multi-factor auth.
The steps to set up your preferred verification method begin on this page.
Once the administrator has configured your Office 365 environment and one or more devices to use a second verification method, then you will now do a two-part sign in. First, you enter your work or school account user name and password. Then you use a second verification method through a phone, a text message, or the Authenticator app. You set up your preferred verification method the first time you do the two-part sign in.
It will display the Additional security verification page, click Set it up now.
Choose Mobile app and receive notification for verification
It will take you to the Configure Mobile App Page, Follow the instruction on the page Click on the Contact me button
As a next step you need to enter the code which displayed on the mobile app and click on verify
Type the mobile number incase to access using SMS verification
That’s it you are ready to use the Multi-Factor Authentication
Here we go the MFA is Enabled now.