HealthManagerObserverMonitor monitoring non-existant server.

Hi all,

I have recently removed two Exchange 2013 CU1 servers (running the Client Access role only). I removed them by uninstalling Exchange and then removing the computer object from Active Directory. No errors were reported during the uninstall, and Get-ExchangeServer no longer shows the servers. After removing the two servers, I rebooted every other Exchange Server (all 2013 CU1) in the domain.

Despite removing these servers, it looks as though the Exchange Health Manager is still looking for them:

RunspaceId              : 4dcb42d3-b09b-4bcd-8877-22809f6d53c0
Server                  : exmbx01
CurrentHealthSetState   : NotApplicable
Name                    : HealthManagerObserverMonitor
TargetResource          : EXCAS01.example.com
HealthSetName           : RemoteMonitoring
HealthGroupName         : ServiceComponents
AlertValue              : Unhealthy
FirstAlertObservedTime  : 04/02/2014 09:46:18
Description             :
IsHaImpacting           : False
RecurranceInterval      : 0
DefinitionCreatedTime   : 04/02/2014 10:18:29
HealthSetDescription    :
ServerComponentName     : None
LastTransitionTime      : 04/02/2014 10:18:29
LastExecutionTime       : 04/02/2014 10:40:43
LastExecutionResult     : Succeeded
ResultId                : 34859481
WorkItemId              : 534
IsStale                 : False
Error                   :
Exception               :
IsNotified              : False
LastFailedProbeId       : 107
LastFailedProbeResultId : 25184538
Identity                : RemoteMonitoring\HealthManagerObserverMonitor\EXCAS01.example.com
IsValid                 : True
ObjectState             : New

Has anybody else experience this?

Thanks,

Gavin