I'm running into a Managed Availability issue. My server has the ActiveSync health set Unhealthy. After investigation I noticed the following error when the probe runs:

WARNING: Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index

Command used: Invoke-MonitoringProbe ActiveSync\ActiveSyncCTPProbe -Server <servername>

I was not able to troubleshoot the issue any further from this point. This happens on all servers, Exchange 2013 CU7. I did not make configuration changes against the EAS virtual directory. Reboots, restarting services and waiting did not solve the issue. The information on https://technet.microsoft.com/en-us/library/ms.exch.scom.activesync%28v=exchg.150%29.aspx did not help either, because I'm stuck with the error message.

• Edited by Jetze Mellema 19 hours 9 minutes ago

Hey Jetze. I see these all the time on my CU7 servers as well. Hopefully fixed in CU8 or CU9?

Hi Andy, how are you? Yeah, I ignore them usually but they are becoming a bit of a problem now. It looks almost impossible to have the server 'all green' in SCOM with two or three of this nasty issues on every single server.