Hi @jcrawf2,
You need to go back one step and to figure out what is your authentication method and from where does the MFA request come. It must be changed under MFA system, which can either be synced with some other DB (eg. HR DB is synced to AD, AD is synced to MFA), so it must be changed there, so it can be further synced where it needs to exist.
You are mentioning Microsoft, so I assume you are using Azure AD, but that can be populated in many different ways, so you need to figure that one out on your own.
Kind regards,
Milos