I hope this will help,
First time you have to create new user like Aaa, Bbb & Ccc in User/Groups-Users-Create New User. For practice just put a simple username.
After that create new group in User/Groups-Users-Create New Group. For example group for Admin, Finance and Logistic
Go to Group Summary and click Admin and go to Members of This Group and type Aaa then click “add”. User Aaa should be on the list below.
then choose “Enable Contact List Group Sharing”, type admin in Enter contact list group name ****and mark “Share group with additional users” and “all users”
Save Contact List Setting.
Restart Openfire service, and all Groups and Assigned User to that group will automatically showing on Spark or Pandion