With MFA you have two ways of identification. This often comes down to login details (username and password) and a code via an app on your smartphone. Someone who has stolen your login details still can't log in to systems or services, because this also requires the code from your smartphone. Have you or your company/supplier been hacked? Then this need not be a problem. We use Microsoft Authenticator for this. The extra login codes are not your own systems but open. With the Microsoft app, you can therefore also set MFA on your Gmail account, your bank, Office 365, supplier of crypto currency or your Apple ID. It is a generic standard.