Perceptive Search supports 2 documents renders, they are:
Select this option to achieve the fastest indexing and browsing speeds possible within your environment. When browsing a document Perceptive Search will make use of its own internal viewers which will allow for multiple hit colors.
Select this option if you want Perceptive Search to attempt to render your legacy documents,
such as Microsoft Word, Excel, WordPerfect, etc, as HTML. This representation whilst
rich will not be the same as the original document.
With this option selected, your email
messages that are saved as *.MSG and *.EML files will also be presented as HTML.
Note that if you are indexing Microsoft Outlook's email files (*.MSG), they will be presentsd as HTML only if
you have installed Extended MAPI client, such as Microsoft Outlook.
If Outlook is not available, Microsoft Exchange Server MAPI Client must be installed instead. You can download it from
http://www.microsoft.com/downloads/details.aspx?FamilyID=E17E7F31-079A-43A9-BFF2-0A110307611E&displaylang=en