Hi Mark,
The MS Office Document Imaging Files (.MDI) is a MS page based
graphic format similar to a TIFF format. There isn't a viewer
available for .MDI files, but if someone has Office 2003 the
MS Office Document Image Writer Printer Driver installed they
can basically print to TIFF. This article has some additional
information and a sample process for creating the files.
http://office.microsoft.com/assistance/preview.aspx?AssetID=HA011111451033
The TIFF/FAX files can be viewed by graphics or fax viewers
by a good number of users who don't have MS Office.
========
How does a Windows users without Office 2003 view a Microsoft Office
Document Imaging File? Is there a viewer available and where?
Thanks. >>
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I hope this helps you,
Bob Buckland ?

MS Office System Products MVP
*Courtesy is not expensive and can pay big dividends*
Office 2003 explained
http://microsoft.com/uk/office/editions.asp