-- SQL Server should be configured to allow Kerberos authentication. For the client driver running on Unix, integrated authentication is supported only by using Kerberos. For more information, see [Using Kerberos integrated authentication to connect to SQL Server](../connect/jdbc/using-kerberos-integrated-authentication-to-connect-to-sql-server.md). There should be [service principal names (SPNs)](/windows/win32/ad/service-principal-names) registered for each instance of SQL Server you're trying to connect to. For more information, see [Register a Service Principal Name for Kerberos Connections](/sql/database-engine/configure-windows/register-a-service-principal-name-for-kerberos-connections).
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