NTLM Authentication NTLM authentication is available in the following the DataDirect Connect Series for ODBC drivers: • SQL Server Wire Protocol • Driver for the Teradata database The following table provides the platform support information for the drivers. Table 7. Driver Support for NTLM Authentication Driver Windows Linux/UNIX SQL Server Wire Protocol X X1 Driver for the Teradata database X 1 NTLM single sign on is not supported. To connect to SQL Server, users must use connection attributes to supply the Windows User Id, Password, and Domain to the driver.