How to disable/enable MFA(Multi factor authentication) for the account in the Office 365 admin center

Step 1: Sing into Office portal via https://portal.office.com/

Step 2: On the left pane, select Users > Active users.

Step 3: In the Active users pane, select More > Multi-factor authentication setup.

Step 4: Select the check box next to the user.

Step 5: Under quick steps, select Disable.