Currently, if the date format of a cell is not specified in the document Prizm's MSO renderer defaults to the short date format specified by it's OS.
This means that supporting multiple date formats for international customers requires either control over the original document, which may not be feasible, or multiple PrizmDoc servers, one for each date format.
Adding an optional parameter to specify the date format that should be used when processing Excel documents would allow this to be handled on a case by case basis.