If you want to add a new file type to the Level 1 list, you can do so by creating a new string value named Level1Add beneath the HKEY_CURRENT_USER\Software\Microsoft\Office\10.0\Outlook\Security key.
Note: To check whether a user has customized his or her Outlook security settings, use the Help | About Microsoft Outlook command. Above the license information, Outlook displays the security mode (mine says Security Mode: Default); a user-customized machine will say Security Mode: User Controlled.
Of course, it is more likely that you'll want to prevent users from customizing their own security settings. The easiest way to do this is to add a new REG_DWORD value named DisallowAttachmentCustomization to the Outlook key at HKCU\Software\Policies\Microsoft\Office\11.0\Outlook. When this value is present, Outlook will ignore the Level1Add and Level1Remove keys mentioned earlier.
8 tips in 8 minutes: A Microsoft Outlook email security tutorial
Tip 1: An overview of Microsoft Outlook email security features
Tip 2: Customizing the Microsoft Outlook Security Update
Tip 3: Customizing Outlook email security settings for end users
Tip 4: Setting up RPC over HTTP for Microsoft Outlook
Tip 5: Using S/MIME in Microsoft Outlook
Tip 6: Using Information Rights Management in Microsoft Outlook
Tip 7: Reaching into Microsoft Outlook's email security toolbox
Tip 8: Related resources on Microsoft Outlook email security
|This chapter is an excerpt from Secure Messaging with Microsoft Exchange 2003 by Paul Robichaux, copyright 2004, published by Microsoft Press.|
This was first published in May 2007