When the following message appears in the Event Viewer: Error event when you try to start the Microsoft Dynamics CRM E-mail Router Service in Microsoft Dynamics CRM: “The E-mail Router service could not run the service main background thread” Follow the next steps: If you are not on Update Rollup 13, to resolve this problem, follow these steps:
Delete the Microsoft.Crm.Tools.EmailAgent.SystemState.xml file. Notes
By default, the Microsoft.Crm.Tools.EmailAgent.SystemState.xml file is in the following folder:
C:Program FilesMicrosoft CRM EmailService
By default, the Service folder is a hidden folder. To see this folder, you must change the Windows Explorer settings to display hidden files and hidden folders.
Restart the Microsoft Dynamics CRM E-mail Router Service. The Microsoft.Crm.Tools.EmailAgent.SystemState.xml file is re-created.