The application can specify the user ID and password or password phrase by setting eci_userid_ptr and eci_password_ptr in the ECI V2 parameter block.
The fields eci_userid and eci_password are provided for compatibility with existing applications. New applications must use eci_userid_ptr and eci_password_ptr.
The maximum length of a user ID and password or password phrase depends on the CICS® server version and communications protocol type. For more information see your CICS server documentation.