Microsoft Exchange Activesync Error Codes
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Exchange TeamJanuary 31, 201230 Share 0 0 ActiveSyncReport script Download The Exchange support team relatively frequently receives cases where mobile devices using Exchange ActiveSync (EAS) protocol https://blogs.technet.microsoft.com/exchange/2012/01/31/a-script-to-troubleshoot-issues-with-exchange-activesync/ send too many requests to Exchange server resulting in a situation where server runs out of resources, effectively causing a ‘denial of service’ (DOS) attack. The worst outcome of such http://msexchangeguru.com/2012/02/01/exchange-activesync/ a situation is that the server also becomes unavailable to other users who may not be using EAS protocol to connect. We have documented this issue with possible mitigations in microsoft exchange the following KnowledgeBase article: 2469722 Unable to connect using Exchange ActiveSync due to Exchange resource consumption A recent example of this issue was Apple iOS 4.0 devices retrying a full sync every 30 seconds (see TS3398). Another example could be some devices that do not understand how to handle a ‘mailbox full’ response from the Exchange server, resulting in several tries microsoft exchange activesync to reconnect. This can cause such devices to attempt to connect & sync with the mailbox more than 60 times in a minute, killing battery life on the device and causing performance issues on server. Managing mobile devices & balancing available server resources among different types of clients can be a daunting challenge for IT administrators. Trying to track down which devices are causing resource depletion issues on Exchange 2010/2007 Client Access server (CAS) or Exchange 2003 Front-end (FE) server is not an easy task. As referenced in the article above, you can use Log Parser to extract useful statistics from IIS logs (see note below), but most administrators do not have the time & expertise to draft queries to extract such information from lengthy logs. The purpose of this post is to introduce everyone in Exchange community to a new PowerShell script that can be utilized to identify devices causing resource depletion issue, help in spotting performance trends and automatically generate reports for continuous monitoring. Using this script you can easily & quickly drill into your users' EAS activity,
Troubleshooting Exchange ActiveSync and reading IIS logs In this article I will try cover my way of troubleshooting Exchange ActiveSync issues from Server side and client side. Recently I had an issue where users on one of the Exchange 2007 servers "ONLY" weren't able to sync their mobile device. My way of troubleshooting flows this way which I will explain in detail: Isolate the issue be for user, device, server or organization wide Testexchangeconnectivity.com and a test mobile device Read IIS logs and look at the error's if any Confirm Authentication settings on IIS VDir's for CAS and MBX roles Look at CPU utilization for w3wp.exe on all CAS servers Read event logs and filter MSExchange ActiveSync event in 10xx series Confirm ADPermission for internet facing CAS servers on "ms-Exch-EPI-Token-Serialization" Isolate the issue be for user, device, server or organization wide This is the primary focus area or we will be going in circles. Let's split this into 4 different scenario and the issue should be isolated to one of these: Issue with one single user only: First thing I would look for is to check the OMA AD property enabled or not. Navigate to Active Directory Users and Computers à Search for the user à Exchange Feature tab à Ideally, if this all set to enable, the attribute "msexchOMAAdminWirelessEnable"will be