Error during connection: ""A network-related or instance-specific error occurred while establishing a connection to SQL Server."
説明
The following error occurs during SQL Server connection: "A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. "
対策
Test the same connection from SSMS (preferably from Diagnostic Server machine) and resolve the issue from SQL Server before monitoring instance.