The Royal Commission of Inquiry into the Christchurch Mosque attacks says it is still working on building trust with the Muslim community.
The commission has now had its second meeting with the Muslim Community Reference Group.
The commission faced criticism for the length of time to set up the reference group, with the group not established until the inquiry had been underway for two months.
Commissioner Sir William Young said they had great respect for the members of the reference group and their clear commitment to achieving something of ongoing value for Muslim communities through this work.
"We acknowledge we have a long way to go and we are trying to build trust the reference group, while we also get significant work underway together.
"We're asking a lot of each reference group member. Their involvement requires a significant commitment of time, energy and responsibility and we don't underestimate that."
He said the day-long meeting was highly productive and was the second of a series of meetings planned.
The Royal Commission has asked for the group's advice and feedback on issues relevant to Muslim communities and on how to build further opportunities for those communities to take part in the inquiry.
Submissions to the commission close on Friday, 27 September.