Complex sentence: The last Annual Convention took place in September 2016-no event is planned for 2017 and the future of this and other flagship events is in doubt given the disbandment of the IoD Events department.
Split into simpler sentences: The last Annual Convention took place in September 2016. No event is planned for 2017 and the future of this and other flagship events is in doubt given the disbandment of the IoD Events department.