Hi @Ian Spencer ,
If you want to enable TLS 1.2, you need to install SQL Server 2012 Native Client – QFE, which is latest servicing update available for the SQL Server 2012 Native Client. Note that Microsoft will not be releasing a SQL Server 2014 or later version of the SQL Server Native Client. The SQL Server 2012 Native Client can continue to be utilized by SQL Server 2014 and later versions. You can download it from here.
In addition, please refer to TLS 1.2 support for Microsoft SQL Server which might help.
Best Regards,
Amelia
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