How to mark item as Read/Unread when selection changes in Outlook 2003.

Requirement: Microsoft Outlook 2003.

1. Open your Microsoft Outlook 2003
2. On the top menu, Go to Tools
3. Click the "Options"
4. On "Other" tab, find the "Reading Pane" section.
5. Click the "Reading Pane" button then check or uncheck the selection based on your requirements.
6. Then Click OK.