Configure the server to accept encrypted connections and use the correct certificate for the Transport Layer Security (TLS) connection.
Enable the forced encryption option in MS SQL Server Configuration Manager.
Before you begin
Ensure that you have configured a certificate on your server from System Manager or the third-party CA.
Procedure
Click and locate and open Microsoft SQL Server N > SQL Server Configuration Manager where N is the installed version of MS SQL.
Alternatively: Press +R and enter compmgmt.msc to start Computer Management. Expand Services and Applications and locate SQL Server Configuration Manager.
Expand SQL Server Network Configuration
Right-click Protocols for MSSQLSERVER, and select Properties.
In the Properties window:
On the Flags tab: In the Force Encryption field, click Yes and then click OK.
On the Certificate tab: In the Certificate field, click the required certificate and then click OK.
To apply the changes:, right-click the required MS SQL server and restart the MS SQL Server service.