ActiveSync is failing on ClientAccess server

I received following SCOM alert, I followed the steps described in article below.  Unfortunatelly, the result is unsuccessfull and the alert still exists.

Article: https://docs.microsoft.com/en-us/exchange/management/health/troubleshooting-activesync-health-set

Thanks for any help.

-->Actions that I completed:

1. I run Get-ServerHealth (output is below)
2. I run Invoke-MonitoringProbe (output is below)
3. I recycled MSExchangeSyncAppPool
4. I recycled entire IIS by IISReset.

========= SCOM ALERT ===================

ActiveSync is failing on ClientAccess server <myServer>.
Incident start time: 5/21/2019 12:15:41 AM

Last failed result:
Failing Component - Auth
Failure Reason - 401

Exception: System.Net.WebException: Error occurred:

User: HealthMailbox2571b80e9c0e44d08b000c286fb684e4@***.com.tr
Password: ******
Target: https://localhost/Microsoft-Server-ActiveSync
Response: No body
Diagnostics header:NoDiagnosticsHeaderReturned
at Microsoft.Exchange.Monitoring.ActiveMonitoring.ActiveSync.Probes.ActiveSyncProbeBase.ReportFailure(Boolean isAborted)
at Microsoft.Exchange.Monitoring.ActiveMonitoring.ActiveSync.Probes.ActiveSyncProbeBase.DoWork(CancellationToken cancellationToken)
at Microsoft.Exchange.Monitoring.ActiveMonitoring.ActiveSync.Probes.ActiveSyncCustomerTouchPointProbe.DoWork(CancellationToken cancellationToken)
at Microsoft.Office.Datacenter.WorkerTaskFramework.WorkItem.Execute(CancellationToken joinedToken)
at Microsoft.Office.Datacenter.WorkerTaskFramework.WorkItem.<>c__DisplayClass2.<StartExecuting>b__0()
at System.Threading.Tasks.Task.Execute()

Diagnostic command: Invoke-MonitoringProbe -Identity:"ActiveSync\ActiveSyncCTPProbe" -Server:MAILSERVER | fl

Knowledge: http://technet.microsoft.com/en-us/library/ms.exch.scom.ActiveSync(EXCHG.150).aspx?v=15.0.1104.5

============================

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

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

===== Invoke-MonitoringProbe ActiveSync\ActiveSyncCTPProbe -Server <myServer> | Format-List ==========

RunspaceId         : d9e90279-9989-4347-b408-9325c650f62c
Server             : myServer.***.com
MonitorIdentity    : ActiveSync\ActiveSyncCTPProbe
RequestId          : 19d39ef9-dbcb-4e5b-8e7f-9b21c13d117a
ExecutionStartTime : 5/21/2019 8:56:57 AM
ExecutionEndTime   : 5/21/2019 8:56:57 AM
Error              : Error occurred:

                     User: HealthMailbox2571b80e9c0e44d08b000c286fb684e4@***.com.tr
                     Password: ******
                     Target: https://localhost/Microsoft-Server-ActiveSync
                     Response: No body
                     Diagnostics header:NoDiagnosticsHeaderReturned
Exception          : System.Net.WebException: Error occurred:

                     User: HealthMailbox2571b80e9c0e44d08b000c286fb684e4@****.com.tr
                     Password: ******
                     Target: https://localhost/Microsoft-Server-ActiveSync
                     Response: No body
                     Diagnostics header:NoDiagnosticsHeaderReturned
                        at Microsoft.Exchange.Monitoring.ActiveMonitoring.ActiveSync.Probes.ActiveSyncProbeBase.ReportF
                     ailure(Boolean isAborted)
                        at Microsoft.Exchange.Monitoring.ActiveMonitoring.ActiveSync.Probes.ActiveSyncProbeBase.DoWork(
                     CancellationToken cancellationToken)
                        at Microsoft.Exchange.Monitoring.ActiveMonitoring.ActiveSync.Probes.ActiveSyncCustomerTouchPoin
                     tProbe.DoWork(CancellationToken cancellationToken)
                        at Microsoft.Office.Datacenter.WorkerTaskFramework.WorkItem.Execute(CancellationToken
                     joinedToken)
                        at
                     Microsoft.Office.Datacenter.WorkerTaskFramework.WorkItem.<>c__DisplayClass2.<StartExecuting>b__0()
                        at System.Threading.Tasks.Task.Execute()
PoisonedCount      : 0
ExecutionId        : 35250495
SampleValue        : 15
ExecutionContext   : Error occurred:

                     User: HealthMailbox2571b80e9c0e44d08b000c286fb684e4@*****.com.tr
                     Password: ******
                     Target: https://localhost/Microsoft-Server-ActiveSync
                     Response: No body
                     Diagnostics header:NoDiagnosticsHeaderReturned
FailureContext     :
ExtensionXml       :
ResultType         : Failed
RetryCount         : 0
ResultName         : 19d39ef9dbcb4e5b8e7f9b21c13d117a-ActiveSyncCTPProbe
IsNotified         : False
ResultId           : 91456467
ServiceName        : InvokeNow
StateAttribute1    : Auth
StateAttribute2    : 401
StateAttribute3    : myServer
StateAttribute4    : UnkownMailboxServer
StateAttribute5    :
StateAttribute6    : 401
StateAttribute7    : 0
StateAttribute8    : 0
StateAttribute9    : 0
StateAttribute10   : 0
StateAttribute11   :
StateAttribute12   :
StateAttribute13   : S1FAIL/HTTP:401/EASStatus:0
StateAttribute14   : NoDiagnosticsHeaderReturned
StateAttribute15   :
StateAttribute16   : 0
StateAttribute17   : 0
StateAttribute18   : 0
StateAttribute19   : 0
StateAttribute20   : 0
StateAttribute21   : MaxTimeout:5/21/2019 8:58:27 AM;PDWS;PDWE:08:56:57.1366865;BDWS;CurrentNow:08:56:57.1366865;BCBS;P
                     SMS;PSME:08:56:57.1366865;BCBE:08:56:57.1366865;BDWE:08:56:57.1366865;BRFS;BRFE:08:56:57.1366865;
StateAttribute22   : https://localhost/Microsoft-Server-ActiveSync
StateAttribute23   : ****
StateAttribute24   :
StateAttribute25   :
Identity           : 37e6a8ad06f54aef9d9ce261fd65f4bd
IsValid            : True
ObjectState        : New