How can we disable Multi Factor Authentication to all users in our Office 365
Disable MFA Through the Microsoft 365 Admin Center Portal.

Go to Microsoft 365 Admin Center ([ Ссылка ]) and sign in under an account with tenant Global administrator permissions;
Go to Users - Active Users;
Click on Multi-factor authentication
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4. A page will appear with a list of users in your Microsoft 365 tenant and the MFA status for each of them (this window doesn’t show if the user has completed the MFA process and it doesn’t indicate which MFA authorization option the user enabled).

5. To disable MFA for a user, click on it.

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6. Several buttons will appear in the right column (Quick Steps) which allow you to enable, disable MFA, or configure user settings.

7. Click on Disable and confirm to disable MFA for the user.

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On the Service Settings tab, you can configure additional MFA options


Bước 1: Đăng nhập trang : Security defaults - Microsoft Entra admin center-> Overview ->Properties ->
manage security default -> Chọn Disable -> Save

Link:
[ Ссылка ]
AM_legacyAADRedirect=true

Bước 2 :Đăng nhập admin theo link: Users - Microsoft Entra admin center -> User -> All user-> Per user
MFA
Link:
[ Ссылка ]
AllUsers/menuId/?Microsoft_AAD_IAM_legacyAADRedirect=true

Chọn user -> Enable để bật MFA cho user cần bật, Disable để tắt MFA cho user cần tắt

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