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You use the Microsoft Dynamics CRM 4.0 E-Mail Router service to process e-mail messages. After a specific period of time, the service stops processing e-mail messages. Then, after the same period of time, the service starts to process e-mail messages again.
Note The value of the specific period of time is the same as the ConfigUpdatePeriod value that is set in the Microsoft.Crm.Tools.EmailAgent.xml file. For example, if the ConfigUpdatePeriod value is one hour, the service stops processing e-mail messages after one hour. Then, after another hour, the service starts to process e-mail messages again.
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 software update terminology, 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