What is the best way to secure attachments in OWA 2003?

Some companies choose to secure block attachment access for all OWA users but this is not practical for most companies. If you cannot disable attachment access, there is a third party add-on called AttachView (www.messageware.com) which gives users the ability to view attachments in OWA without caching them on the client machine. AttachView secures attachments in email messages, contact folders, calendar appointments and public folders.