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Event ID: 1507 Source: MSExchangeOMA

Source
Level
Description
An unknown error occurred while processing the current request: Exception of type Microsoft.Exchange.OMA.DataProviderInterface.ProviderException was thrown.
Stack trace:
Comments
 
This problem can occur because of virtual memory fragmentation. See WITP81887 for information on how to fix it.
As pre Microsoft: "This problem may occur if Exchange Server 2003 is running on a Microsoft Windows 2000-based computer. In this scenario, virtual memory fragmentation may occur if Exchange Server 2003 is under a heavy load. You may experience this problem during stress-testing of your Exchange Server environment". See ME842119 for details on this issue.

See ME817379 and MSEX2K3DB for aditional information on this event.

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