hi there
that looks more like an outlook issue than a Knime issue to me… do a search on how to get attamentents into a folder and then you can access the excel from there by Knime…
here is a link that I came up with:
your excel formulas are preserved in excel of course, but Knime will just read the figures in the xls cells…
I suggest you import the raw data from excel and do the formulas in Knime