Question : RPC over HTTPS

I need some guidance with my exchange server.
I have gone through several tutorials and still cant get it to work.

Heres what I have.
Only one server and its the exchange server, domain controller, global catalog server.
Windows 2003 SP2.
Exchange 2003 SP2.
We purchased the ssl cert from godaddy and installed it.

right now users can get to webmail from http. when i try to force it to https for owa, i cant get to it.

this is the guide i followed.
http://www.petri.co.il/how-can-i-configure-rpc-over-https-on-exchange-2003-single-server-scenario.htm

Answer : RPC over HTTPS

The syntax error is easily fixed by
...OpenFile(PAnsiChar(FileName), ..
but it doesn't actually work.

This one does.

function FileInUse(FileName: string): Boolean;
var hFileRes: HFILE;
begin
  Result := False;
  if not FileExists(FileName) then exit;
  hFileRes := CreateFile(PChar(FileName),
                                    GENERIC_READ or GENERIC_WRITE,
                                    0,
                                    nil,
                                    OPEN_EXISTING,
                                    FILE_ATTRIBUTE_NORMAL,
                                    0);
  Result := (hFileRes = INVALID_HANDLE_VALUE);
  if not Result then
    CloseHandle(hFileRes);
end;