Installation when TLS 1.0 is disabled

SQL Server Native Client 11.0 is referenced in database connection strings as SQLNCLI11. It provides a suitable ODBC (OLE DB) driver that supports TLS 1.1/1.2 necessary for the MSI installer, and is not required for .NET Framework applications.

Also known as SQL Server 2012 Native Client you can download the installer (sqlncli.msi) from this Microsoft link. You can then install the Client Components feature. This version supports SQL Server 2012, 2014, 2016 and 2017.

You can confirm the driver is installed using the ODBC Data Sources utility, as shown opposite.

If TLS 1.0 is disabled and you attempt to install without SQL Server Native Client 11.0 then the installer will fail with Error 27502. Could not connect to Microsoft SQL Server ... SSL Security error.