This chapter introduces a powerful online distributed and asynchronous active fault management (DA-AFM) tool which proactively manages the fault currents by controlling the power electronic interfaces and eliminates the barriers against networked microgrids resilience and the ultrareliable operations of DERs/microgrids. Upon fault occurrence, DA-AFM is able to maintain the total fault current unchanged to avoid detrimental impact on the power grid, to eliminate the damaging power ripples for inverters in DERs/microgrids, and to ensure that the power flow of each individual microgrid is identical before and after fault to avoid loss of loads and maintain networked microgrid stability.