Earlier this week I was trying to figure out a way to view headers of various messages in my Outlook Web Access inbox and realized that out of the box Exchange 2003 Outlook Web Access does not have a way to view message headers. What! You mean I have to open an Outlook client just to view headers?
According to some sites I read, the only work around to viewing these headers is to replace a file on the Exchange server to provide for this functionality. Argh!
Anyways, if you think this feature is essential and have access to your Exchange 2003 server try the updated file available at Exchange 2003 Outlook Web Access Extension Allows You to View Message Source or at the Information and Utilities for Exchange/IIS Administrators page.
Out of curiosity, does anyone know if Exchange 2007 has this feature integrated with Outlook Web Access?