SECURING
Ensure that browsers are configured to support Integrated Windows Authentication (IWA).
Enabling Integrated Windows Authentication in Firefox Follow these steps to enable Firefox users to use Integrated Windows Authentication (IWA) to authenticate through ADFS.
Related tasks Creating ADFS service principal names (SPNs) Enabling Integrated Windows Authentication on ADFS 2.0 Enabling Integrated Windows Authentication for ADFS 3.0 or 4.0