procedure SSLUpdateGroup(GroupName: String; GroupID: Word; UserIDs: TStringList)
Update group.
UserIDs - this parameter should contain a string list of all UserID values which belogs to this GroupID.
Can be used to rename any SSL group. (official clones send this command also when adding/removing users from SSL).
As answer you will receive OnSSLChangeResponse event.
Example:

procedure TMainForm.Button1Click(Sender: TObject);
var
  List: TStringList;
begin
  ICQClient1.SSLChangeStart(False);
  ICQClient1.SSLAddGroup('My Good Friends', 0010);                                  //Create group 'My Good Friends' with id 0010
  ICQClient1.SSLAddGroup('Me lovers', 0011);                                        //Create group 'Me lovers' with id 0011
  ICQClient1.SSLAddUser(0010, 0020, '4024781', 'Coban', '', False, False);          //Add user Coban with UIN 4024781 in 'My Good Friends' group
  ICQClient1.SSLAddUser(0010, 0021, '98384233', 'Animal Killer', '', False, False); //Add user Animal Killer in 'My Good Friends' group
  ICQClient1.SSLAddUser(0011, 0015, '848382', 'Britney', '', False, False);         //Add user Britney in 'Me lovers' group
  ICQClient1.SSLAddUser(0011, 0015, '848382', 'Britney my Love!', '', False, True); //Rename 'Britney' to 'Britney my Love!' ;)

  List := TStringList.Create;   //Create temporary list
  List.Add(0020);               //Add Coban's UserID to list
  List.Add(0021);               //Add Animal Killer's UserID to list

  ICQClient1.SSLUpdateGroup('My Bad Friends', 0010, List);                          //Rename group 'My Good Friends' to 'My Bad Friends'

  List.Free;

  ICQClient1.SSLChangeEnd;
end;