Topic Status: Some information in this topic is preview and subject to change in future releases. Preview information describes new features or changes to existing features in Microsoft SQL Server 2016 Community Technology Preview 2 (CTP2).

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SQL Server

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Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding. (Microsoft SQL Server, Error: -2)

The SQL Server client cannot connect to the server. This error could occur because the firewall on the server has refused the connection.

Make sure that you have configured the firewall on the server instance of SQL Server  to accept connections.

Community Additions