The following connection strings configure the driver to use Always Encrypted with the minimum required properties.

For connections using Azure Key Vault: 

"jdbc:datadirect:sqlserver://MyServer:1433;
      AEKeystorePrincipalId=789f8b4c-7a4a-445d-6oe9-7bec14625645;
      AEKeyStoreClientSecret=ABcdEFg/hiJkLmNOPqR01stUvWxyzYx2wvUTsrQpO=;
      ColumnEncryption=Enabled;"

For connections Java KeyStore: 

"jdbc:datadirect:sqlserver://MyServer:1433;
      AEKeystoreLocation=/usr/java/jre/lib/security/cacerts;AEKeystoreSecret=secret;
      ColumnEncryption=Enabled;"