Some of our users get the following message on their mailbox (see below). My first question before trying to get to the root cause is: How is that message generated? Where can we enable/disable it? Has anybody seen this? From: "Jdoe" <JDoe@Domain.com> Date: Feb 9, 2011 19:00:01 AM EST To: "JDoe" <Jdoe@domain.com> Subject: Synchronization with your iPad failed for 1 items. Synchronization with your iPad failed for 1 items. Microsoft Exchange was unable to send the following items to your mobile device. These items have not been deleted. You should be able to access them using either Outlook or Outlook Web Access. Item Folder: Calendar Item Type: IPM.Appointment Item Created: 9/20/2010 2:30:26 AM Item Subject: Meeting with the vendor

Have a look at this we had the same issue and patched the enviroment. http://blogs.salentica.com/pgernburd/2011/01/07/synchronization-failed-for-1-items-on-mobile-phones/

Basically your device connect to the activesync server through http/s long polling queries. Sometimes they can fail due to network issues, poor network coverage etc. and the email system generates such alerts. You might find the failure in the iis log used by the activesync service. Besides that, no information has been lost by the email system. Have you recently installed Ex updates ?Vincenzo MCTS, MCTIP Server 2008 | MCTS Exchange 2010 | WatchGuard Firewall Security Professional

We don't have any CRM apps in our environment. I am not sure if your blog applies here.

I will check the logs when this happens again but the IIS logs are usually cryptic and lack info. Thanks