This capability is not customizable, and it is either on or off with no additional settings available. Security defaults provides organizations using Azure Active Directory (AD) with basic MFA capabilities. Use security defaults for basic MFA protection

With any of the following Office 365 MFA setup options, it's important for IT administrators to stop allowing basic authentication protocols such as POP or IMAP, because they don't support the use of MFA. These options range from a static option that is available for every customer with a Microsoft 365 and Office 365 subscription to a dynamic option that's available for customers with the previously mentioned subscriptions and an additional subscription of Azure AD Premium P1. When looking at Office 365, which Microsoft has folded into the Microsoft 365 service, the company provides three solid options for requiring MFA, though creative IT admins may find more. What are the options to set up MFA for Office 365?

Setting up MFA for Office 365 on end-user devices offers organizations significant security benefits, and IT administrators should learn how to deploy this policy to their fleet of managed devices. MFA ensures that even a weak password won't leave an organization completely vulnerable, as MFA requires an additional factor, such as access to a device or a biometric factor. However, the easiest and most effective way to mitigate compromised accounts is to create an additional barrier for hackers by enabling multifactor authentication (MFA).

Setting up mfa for office 365