<A target="_blank" href="https://www-304.ibm.com/support/docview.wss?uid=swg21504183">This is the Technote for SPR #HSAO8CZMTK </A>regarding a Domino Server crash that occurs on the router task while processing iCal message. An interim hotfix is now available for this problem under Domino 8.5.2.2.