When acting as a client to HSBC FXtransact, the IAF should be configured with the HSBC specific configuration file, the distribution version of which can be found here:

Note that the requirement for a HSBC-specific configuration file means that an IAF using this configuration file must be used for HSBC FIX sessions only. The FIX adapter will not interoperate correctly with other FIX servers once it has been configured for HSBC operation. If you need to connect to other FIX servers as well as HSBC, the non-HSBC sessions should be configured in a separate IAF instance. However, HSBC and non-HSBC session can co-exist safely within the same correlator instance.

HSBC provided host, port, sender and target CompID parameters must be supplied in the IAF parameter file.