Hi SilverChips asked,
Use the IIS Authentication section of the Azure Multi-Factor Authentication (MFA) Server to enable and configure IIS authentication for integration with Microsoft IIS web applications. The Azure MFA Server installs a plug-in that can filter requests being made to the IIS web server to add Azure Multi-Factor Authentication. The IIS plug-in provides support for Form-Based Authentication and Integrated Windows HTTP Authentication. Trusted IPs can also be configured to exempt internal IP addresses from two-factor authentication.
More information about configure Azure Multi-Factor Authentication Server for IIS web apps you can refer to the link.
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