Hi

We have the following error on a 2013 CAS that I cant seem to find any details on (see below).

CAS is part of a migration from EX2010 and sits behind TMG2010. All systems are working, CAS is passing traffic through to 2010 CAS.

Any help much appreciated.

Dan

ActiveSync is failing on ClientAccess server SERVER1. Incident start time: 26/04/2015 20:01:27 Last failed result: Failing Component - Failure Reason - Exception: System.ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index at System.Collections.Generic.List`1.get_Item(Int32 index) at System.Linq.Enumerable.ElementAt[TSource](IEnumerable`1 source, Int32 index) at Microsoft.Exchange.Monitoring.ActiveMonitoring.ActiveSync.Probes.ActiveSyncCustomerTouchPointProbe.GetMonitoringAccount() 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:SERVER1 | fl

Monitor ActiveSyncCTPMonitor/ActiveSync