Microsoft Windows 2003 does not have Collaboration Data Objects (CDO) for NTS (CDONTS) nor for Exchange 2000 (CDOEX) installed. Therefore, applications that uses CDONT or CDOEX will not function. To install them use the steps below: 1. Download cdo.zip file. Then extract both (or only one as needed) to %systemroot%system32. 2. Register the files using