Extend Azure MFA with features that are only supported by the MFA server on-prem
Extend Azure MFA with features that are only supported by the MFA server on-prem!
Customized text messages
Token Support (I read it is planned)
In addition to this, Azure MFA needs the help desk options that MFA Server on prem provides. Access to security question and a better self-service portal within Azure would go a long way to improving Azure MFA usability in a number of different use-case scenarios.