If you have a low-bandwidth network connection or a high-latency network connection between Microsoft Dynamics CRM 4.0 client for Outlook and the Microsoft Dynamics CRM 4.0 server, you receive the following error message when you try to go online :
An unknown error has occurred. Retry the action. If the problem persists, contact your system administrator.
Additionally, when you run a platform trace in the Microsoft Dynamics CRM 4.0 client for Outlook, the following error message appears in the platform trace:
Exception occurred in playback of SOAP packet System.Net.WebException: The operation has timed out at System.Net.HttpWebRequest.GetResponse() at Microsoft.Crm.Application.Outlook.SyncQueue.SyncQueueDriver.ProcessSoapPacket(OfflineQueueRow row, SoapPacketModifier packetModifier) at SyncQueueDriver.ProcessSoapPacket(OfflineQueueRow row, SoapPacketModifier packetModifier) at SyncQueueDriver.DoGoOnline() at SyncQueueDriver.GoOnline() at SyncQueueForOutlook.DoGoOnline() at ThreadHelper.ThreadStart_Context(Object state) at ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state) at ThreadHelper.ThreadStart()
This problem occurs if you added some large attachments to an e-mail message when you were offline.
This problem is fixed in the latest cumulative update rollup for Microsoft Dynamics CRM 4.0. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
949256 Microsoft Dynamics CRM 4.0 updates and hotfixes
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information about the terminology that is used to describe Microsoft software updates, click the following article numbers to view the articles in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates
887283 Microsoft Business Solutions CRM software hotfix and update package naming standards