README - HP Systems Insight Manager 5.3 with Update 1

WMI Mapper
If you have created subscriptions on a Windows managed system and then elects to change the WMI
Mapper proxy or install a WMI Mapper on the managed system, you must first unsubscribe for WBEM
events, change the proxy, re-identify the systems, and then resubscribe for WBEM events. If you do not
unsubscribe for the WBEM events, HP SIM will no longer receive indications from the managed system.
52 Known Issues and Workarounds