The ESMQXA module is provided as part of Enterprise Developer and does not need to be built. The filename for the built module is esmqxa.dll.
By default, the ESMQXA module operates in two-phase commit mode. You can set the environment variable ES_MQ_1PC to Yes or True in order for the module to operate in one-phase commit mode, but you should only do this if advised to by Micro Focus.