Exchange health set - WARNING: No monitoring account could be found for this server.

Hi all,

We have a hybrid exchange server running at a customer. 
We get the famous Exchange health set error messages in SCOM. Usually these will be resolved by Exchange itself.

Unfortunately that doesn't count for the error message I'm receiving right now. 
What I've tried:

• IISRESET
• re-create the monitoring mailboxes
• See if the error message is active on the probe

My question is about the last dot.

I run the following PS command:

Get-ServerHealth serverFQDN | ?{$_.HealthSetName -eq "ActiveSync"}

Which shows me:

Server          State           Name                 TargetResource       HealthSetName   AlertValue ServerComp
                                                                                                    onent     
------          -----           ----                 --------------       -------------   ---------- ----------
ServerFQDN... NotApplicable   RequestsQueuedGt5... MSExchangeSyncApp... ActiveSync      Healthy    None      
ServerFQDN... NotApplicable   ActiveSyncCTPMonitor ActiveSync           ActiveSync      Unhealthy  None    

So that means that the ActiveSyncCTPMonitor probe is unhealthy, correct? 

Then why will this command say there is no monitoring account? what does it mean with that?

Invoke-MonitoringProbe ActiveSync\ActiveSyncCTPProbe -Server ServerFQDN | Format-List
WARNING: No monitoring account could be found for this server.