Vista's Windows Fax and Scan (WFS) applet does not properly display .tif files created by SBS's fax server. The page is forced into a landscape orientation, distorting the text. Changing the view using the tools in WFS does not allow you to correct the display.
To work around the the problem, install Microsoft Office Document Imaging (MODI). It's installed by default in Office 2003. In Office 2007, however, you must select MODI from a custom installation.