How To Encrypt Connections To The Database

This topic describes how to enable encrypted connections for an instance of the SQL Server Database Engine by specifying a certificate for the Database Engine using SQL Server Configuration Manager. The server computer must have a certificate provisioned, and the client machine must be set up to trust the certificate's root authority. Provisioning is the process of installing a certificate by importing it into Windows.

Please refer to the Microsoft Documentation on this topic: Enable Encrypted Connections to the Database Engine