downloadAs previously reported on this site, the Operations Manager support team identified a regression in a Windows update where installing 2775511 on Operations Manager Management Servers can cause agents or servers to deadlock. Once in deadlock, Management Servers will generate HeartBeat failures and will go into a “grayed out” state, thus devices managed by these Management Servers will also go into a “greyed out” or “not monitored state.”

Please note that this has been fixed in the following update:

KB2878378 - SCOM 2012 or SCOM 2007 R2 throws a "Heartbeat Failure" message and then goes into a greyed out state in Windows Server 2008 R2 SP1 (

J.C. Hornbeck | Solution Asset PM | Microsoft GBS Management and Security Division

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