Collaborative Data Objects (CDO) is not installed in Microsoft Office. You must install this feature for this option to work.
In Control Panel Open Add/Remove Programs.
Click on “Change and Remove Programs” button.
Select “Microsoft Office” from the list on the left.
Click the “Change” button.
Select the “Add/Remove Features” bubble and click next.
Choose the “Choose advanced customization of applications” box and click next.
Expand the Outlook box.
Click on “Collaborative Data Objects” and select run all from my computer.
Click the “Update” button.
This will install the needed software.