User not shown at contact list

I’m using Spark 2.6 RC and Openfire 3.7 beta. I’ve create a AD group (IM-Access) and add user to this group, then user will shown in Openfire admin page. (using MemberOf=CN=IM-Access).

However, some of users can’t be shown in spark contact list, they are all not included in any AD group except IM-Access group. (Can be shown in Openfire admin page)

How can I add those users to spark contact list automatically?