Try this as a first step:
http://www.howto-outlook.com/faq/securetemp.htm
Let me know what happens.
--
Kathleen Orland - MVP Outlook
Outlook Tips:
http://www.outlook-tips.net/
http://www.howto-outlook.com/
"David" wrote:
> Microsoft Outlook 2003 (Corporate)
> Exchange 2000
> Windows XP SP2
>
> Quite a few of our users receive the above error messages when trying to
> open emails which contain attachments. If they click okay on the error
> message, the email opens, but minus the attachments.
>
> The emails are a mixture of internal/external so are from different sources.
>
> I have tried running various Outlook switches, and new Outlook profiles, but
> no success.
>
> Can anyone help?
>
> Thanks!
>
> David