Forwarding emails in Outlook 2003 doesn't always include the full email address of original sender, but instead display name

 For Exmaple , when I forward below email to my colleague, the email addresses that should be linked to the display names in bold are missing / not visible. So when my Colleague wants to reply to this email, he doesn't have the email address.

I have disabled Automatic Name checking in Outlook 2003, however it doesn't appear to have resolved the problem.

Please can you advise how we can get outlook 2003 to output the full email address , so that other who receive the forwarded email can use the email address