After you install Microsoft Internet Security and Acceleration (ISA) Server 2004 or Microsoft Forefront Threat Management Gateway, Medium Business Edition and Windows Essential Business Server 2008, the Microsoft Data Engine (MSDE) instance in Microsoft SQL Server Service Manager appears as Not Connected.
Additionally, you cannot start the MSDE instance in SQL Server Service Manager, and when you click the arrow in SQL Server Service Manager to select either a server or services from the list, the list appears blank.
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