The defendants include 38 Emiratis, the English-language Gulf News daily reported in its online version, without giving other nationalities.
The trial of the group known as Al-Manara opened in August at the state security court in Abu Dhabi, but the international press is barred from attending.
The group smuggled in weapons, ammunition and detonators "obtained in collaboration with Syria's Al Nusra Front", an Al-Qaeda affiliate, as well as militants in Iran, witnesses told the court, quoted in the daily.
The trial was adjourned to December 8.
Authorities reported their arrest on August 2 and prosecutors immediately levelled the accusations against them and said they would face trial.
The UAE is part of a US-led coalition that has been carrying out air strikes against the Islamic State jihadist group in Syria since September 2014.