If you have configured attachment handling on the server to either allow attachments or block attachments, the list of front-end servers that you do not want to be impacted by attachment blocking is ignored. Also, any request through a front-end server specified in the list must still pass Level 1 and 2 restrictions. For information about these restrictions, see "Configuring Attachment Handing" in Managing Outlook Web Access.

For steps for how to configure the value that determines how a server will block attachments, see How to Modify Attachment Handling Settings.

Caution:
Incorrectly editing the registry can cause serious problems that may require you to reinstall your operating system. Problems resulting from editing the registry incorrectly may not be able to be resolved. Before editing the registry, back up any valuable data.

• You may also want to configure the level at which a server will block attachments. For specific steps, see How to Modify Attachment Handling Settings.
  
• For information about managing and configuring Outlook Web Access, see the following topics:
  
  • Configuring Outlook Web Access
    
  • Managing Outlook Web Access