Hi Heidi,
Chuck's information was the correct suggestion for you.
If you only want to do this for one group when you are doing an incident assignment, you use a Reference Qualifier. You can add your group exclusion to the existing Simple Reference Qualifier on incident assignment by adding the condition: Sys ID is not <the sys_id of your group>. And this group will be filtered out from the reference list for the assignment group.
You stated your requirement is: "I have a specific assignment group that is only used by one group and the group should only be visible to only members of that specific group."
If you want to restrict all visibility of that assignment group to anyone except members of that assignment group, you can add a before-query business rule to the sys_user_group table. The script would look something like this:
if (!gs.hasRole("admin") && gs.getSession().isInteractive()) {
var groupMemberGR = new GlideRecord('sys_user_grmember');
groupMemberGR.addQuery('group','=','<sys_id of your group>');
groupMemberGR.addQuery('user','=',gs.getUserID());
groupMemberGR.query();
if (!groupMemberGR.next()) {
current.addQuery('sys_id','!=','<sys_id of your group>');
}
}
If you only do ACLs to restrict visibility to this record, you will get messages on list views of the table like: 1 row removed by security constaints.
