search all users without result limit and change a property of found users:


var myOrg = "230";
var group = people.getGroup("GROUP_Org_" + myOrg);

var scriptUsers = people.getMembers(group); 

for each(var scriptUser in scriptUsers) {
	if (scriptUser.properties.organizationId != myOrg) {
		logger.log(scriptUser.properties.organizationId);
		people.removeAuthority(group, scriptUser);
	}
}