I recently did some work on publishing internal legacy applications using WAP and ADFS for pre-authentication. Wrapping of the production part of these components I wanted to get full visibility into how they performed over time. To do this I added in SCOM management packs for both products. As monitoring kicked in I started seeing that the health of the overall ADFS farm always defaulted to a warning state. Delving a bit deeper into why, I found that it was the “MEX Endpoint Is Unreachable”-monitor that was keeping the farm in this state.