Error while syncing Exchange Web Services in Silverlight application

0
votes

Currently I have developed a Silverlight application which synchronizes Email and its corresponding folders between Exchange and my Silverlight application. I use EWS for ExchangeOnline and I have encountered a problem with synchronization, from time to time it fails..

Here is my setup/scenario of how I got it all configured: API Name: SyncFolderHierarchy, SyncFolderItems Targeted features: synchronization emails and folders with exchange server

Scenario description:

  • create a object of ExchangeService with:

    ExchangeVersion.Exchange2010_SP1 EnableScpLookup = false, TraceEnabled = true, Credentials = new WebCredentials(_exchangeEmail, _exchangePassword)

  • using AutodiscoverUrl for get account url

  • Call SyncFolderHierarchy/SyncFolderItems for sync and get a error message (time to time on different folders)

Other Considerations:

When I run my application it sends about 7 requests every 30 seconds. Unfortunately sometimes I get an error. While on the other hand it does successfully sync two times every 5 minutes (about).

Please see below for error details:

  • folders sync:

    Microsoft.Exchange.WebServices.Data.ServiceResponseException: An internal server error occurred. Try again later. at Microsoft.Exchange.WebServices.Data.ServiceResponse.InternalThrowIfNecessary() at Microsoft.Exchange.WebServices.Data.MultiResponseServiceRequest`1.Execute() at Microsoft.Exchange.WebServices.Data.ExchangeService.SyncFolderHierarchy(FolderId syncFolderId, PropertySet propertySet, String syncState)

  • folder items sync:

    Microsoft.Exchange.WebServices.Data.ServiceResponseException: An internal server error occurred. Try again later. at Microsoft.Exchange.WebServices.Data.ServiceResponse.InternalThrowIfNecessary() at Microsoft.Exchange.WebServices.Data.MultiResponseServiceRequest1.Execute() at Microsoft.Exchange.WebServices.Data.ExchangeService.SyncFolderItems(FolderId syncFolderId, PropertySet propertySet, IEnumerable`1 ignoredItemIds, Int32 maxChangesReturned, SyncFolderItemsScope syncScope, String syncState)

So, my questions are:

  • Is there something in my setup/configuration what might be the reason of these failures from time to time?

  • Is there a possibility to look into online exchange logs?

Any help would be highly appreciated.

Thanks in advance, Dmitry

1
synchronizationexchange-serverexchangewebservices

1 Answers

0
votes

I am not really sure why, but the problem disappears by itself (maybe it was temporary problem on exchange server). According to some internet posts - this can be an issue with throttling.