I need to block the text in the message body of a meeting request (sent from Outlook) to be seen by anyone who has permissions to another user's calender. I have a situation where a manager is frequently receiving meeting requests (from users outside his domain) with sensitive data in the message body. His calender is shared to many users, so if he accepts that meeting request, all those users can see the message body.
If this cannot be done, the second option would be to block all meeting requests sent to a user (or all users in my domain) from anyone outside my domain. I don't want the email for the request to show up in anyone's Outlook.
I would like to avoid using Outlook Rules because the manger does not always access his email through Outlook.
Active Directory 2003 domain, with Exchange 2003 SP2 and Outlook 03/07.